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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>UltraCast — Low-latency screen mirroring for cheap projectors</title>
<meta name="description" content="Stream your Android phone to a cheap HY300-class projector over Wi-Fi. A custom low-latency pipeline with forward error correction and congestion control that stays smooth where Miracast stutters and drops. Free and open source.">
<!-- Social sharing (Reddit/Twitter/etc.). Add an og:image (1200x630) later for a preview thumbnail. -->
<meta property="og:type" content="website">
<meta property="og:title" content="UltraCast — Low-latency screen mirroring for cheap projectors">
<meta property="og:description" content="Mirror your Android screen to a cheap projector over Wi-Fi, smoothly. Open source.">
<!-- <meta property="og:image" content="https://JoelPasapera.github.io/UltraCast/preview.png"> -->
<meta name="twitter:card" content="summary_large_image">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap" rel="stylesheet">
<style>
:root{
--bg:#0A0C10;
--bg-elev:#11141B;
--bg-elev-2:#161B24;
--line:#1F252F;
--line-soft:#181D26;
--text:#E8EBF1;
--muted:#8C95A6;
--dim:#5C6573;
--aqua:#2FE3C9;
--aqua-soft:rgba(47,227,201,.10);
--aqua-line:rgba(47,227,201,.30);
--amber:#F4A15D;
--amber-soft:rgba(244,161,93,.12);
--radius:16px;
--radius-sm:11px;
--maxw:1140px;
--display:"Space Grotesk", system-ui, sans-serif;
--mono:"JetBrains Mono", ui-monospace, monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
font-family:var(--display);
background:var(--bg);
color:var(--text);
line-height:1.6;
-webkit-font-smoothing:antialiased;
overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--aqua);color:#06120F}
:focus-visible{outline:2px solid var(--aqua);outline-offset:3px;border-radius:4px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{
font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;
text-transform:uppercase;color:var(--aqua);font-weight:500;
}
.muted{color:var(--muted)}
/* ---------- NAV ---------- */
header.nav{
position:sticky;top:0;z-index:50;
backdrop-filter:blur(14px);
background:rgba(10,12,16,.72);
border-bottom:1px solid transparent;
transition:border-color .3s ease, background .3s ease;
}
header.nav.scrolled{border-bottom:1px solid var(--line);background:rgba(10,12,16,.86)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:1.05rem;letter-spacing:-.01em;flex-shrink:0}
.brand svg{display:block;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a.lnk{font-size:.92rem;color:var(--muted);transition:color .2s ease}
.nav-links a.lnk:hover{color:var(--text)}
/* language toggle */
.lang-toggle{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--bg-elev);flex-shrink:0}
.lang-btn{
font-family:var(--mono);font-size:.74rem;font-weight:600;letter-spacing:.04em;
padding:7px 11px;background:transparent;color:var(--muted);border:0;cursor:pointer;
transition:background .2s ease,color .2s ease;line-height:1;
}
.lang-btn:hover{color:var(--text)}
.lang-btn.active{background:var(--aqua);color:#06120F}
.btn{
display:inline-flex;align-items:center;gap:8px;
font-family:var(--display);font-weight:600;font-size:.92rem;
padding:10px 18px;border-radius:10px;cursor:pointer;
transition:transform .15s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
border:1px solid transparent;white-space:nowrap;flex-shrink:0;
}
.btn-primary{background:var(--aqua);color:#06120F;box-shadow:0 0 0 0 var(--aqua-line)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px -8px rgba(47,227,201,.45)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--aqua-line);transform:translateY(-2px)}
.btn-lg{padding:13px 24px;font-size:1rem}
/* ---------- HERO ---------- */
.hero{position:relative;padding:clamp(56px,9vw,108px) 0 clamp(48px,7vw,84px);overflow:hidden}
.hero::before{ /* aqua glow */
content:"";position:absolute;inset:-20% 30% auto -10%;height:560px;
background:radial-gradient(closest-side, rgba(47,227,201,.16), transparent 70%);
filter:blur(20px);pointer-events:none;z-index:0;
}
.hero::after{ /* faint grid */
content:"";position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
background-size:54px 54px;
-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy{max-width:560px}
.hero h1{
font-size:clamp(2.4rem,5.4vw,4rem);line-height:1.04;font-weight:700;
letter-spacing:-.025em;margin:20px 0 22px;
}
.hero h1 .hl{color:var(--aqua)}
.hero p.lede{font-size:clamp(1.04rem,1.6vw,1.18rem);color:var(--muted);max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-note{font-family:var(--mono);font-size:.76rem;color:var(--dim);margin-top:20px;letter-spacing:.02em}
.hero-note b{color:var(--muted);font-weight:500}
/* ---------- HERO VISUAL: the projector "screen" + live HUD ---------- */
.screen{
position:relative;border-radius:var(--radius);overflow:hidden;
aspect-ratio:16/10;
background:
radial-gradient(120% 90% at 78% 18%, rgba(47,227,201,.14), transparent 55%),
radial-gradient(90% 80% at 12% 95%, rgba(124,108,255,.10), transparent 60%),
linear-gradient(160deg,#10141C,#0B0E14);
border:1px solid var(--line);
box-shadow:0 40px 80px -40px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
}
.screen::after{ /* scanline sheen */
content:"";position:absolute;inset:0;pointer-events:none;
background:repeating-linear-gradient(0deg, rgba(255,255,255,.018) 0 1px, transparent 1px 3px);
mix-blend-mode:overlay;
}
.screen-bezel{position:absolute;inset:0;border-radius:var(--radius);border:1px solid rgba(255,255,255,.05);pointer-events:none}
.live{
position:absolute;top:16px;left:18px;display:flex;align-items:center;gap:8px;
font-family:var(--mono);font-size:.68rem;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--aqua);box-shadow:0 0 10px var(--aqua);flex-shrink:0}
.pulse{animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.8)}}
/* the HUD card, mirroring the real on-device overlay */
.hud{
position:absolute;left:18px;bottom:18px;right:18px;max-width:330px;
background:rgba(6,10,13,.66);
border:1px solid var(--aqua-line);border-radius:12px;
padding:13px 15px 14px;
font-family:var(--mono);
backdrop-filter:blur(3px);
}
.hud-title{font-size:.6rem;letter-spacing:.26em;color:var(--dim);text-transform:uppercase;margin-bottom:9px}
.hud-rows{display:grid;grid-template-columns:1fr 1fr;gap:5px 16px;font-size:.74rem;color:var(--aqua)}
.hud-rows .k{color:var(--muted)}
.hud-rows b{font-weight:600}
.hud-foot{margin-top:10px;font-size:.66rem;color:var(--muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hud-foot .ok{color:var(--aqua)}
/* live throughput bars */
.bars{display:flex;align-items:flex-end;gap:2px;height:18px;margin-top:11px}
.bars span{flex:1;background:linear-gradient(var(--aqua),rgba(47,227,201,.35));border-radius:1px;height:30%;
animation:eq 1.1s ease-in-out infinite;animation-delay:calc(var(--i) * -.09s);opacity:.85}
@keyframes eq{0%,100%{height:22%}50%{height:90%}}
/* ---------- generic section ---------- */
section{position:relative}
.sec-pad{padding:clamp(64px,9vw,110px) 0}
.sec-head{max-width:640px;margin-bottom:52px}
.sec-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:700;letter-spacing:-.02em;line-height:1.1;margin:14px 0 0}
.divider{height:1px;background:linear-gradient(90deg,var(--line),transparent);border:0}
/* ---------- thesis bridge ---------- */
.thesis{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:var(--bg-elev)}
.thesis .wrap{padding:clamp(40px,6vw,64px) 24px}
.thesis p{font-size:clamp(1.3rem,2.6vw,1.9rem);font-weight:500;letter-spacing:-.015em;line-height:1.35;max-width:880px}
.thesis .em{color:var(--amber)}
.thesis .em2{color:var(--aqua)}
/* ---------- features ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);
padding:26px 24px 28px;transition:transform .2s ease, border-color .2s ease, background .2s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--aqua-line);background:var(--bg-elev-2)}
.card .ic{
width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
background:var(--aqua-soft);border:1px solid var(--aqua-line);margin-bottom:18px;color:var(--aqua);
}
.card h3{font-size:1.12rem;font-weight:600;letter-spacing:-.01em;margin-bottom:8px}
.card p{font-size:.94rem;color:var(--muted);line-height:1.58}
/* ---------- how it works ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{position:relative;padding:28px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev)}
.step .num{font-family:var(--mono);font-size:.8rem;color:var(--aqua);letter-spacing:.1em;font-weight:600}
.step h3{font-size:1.12rem;font-weight:600;margin:14px 0 8px;letter-spacing:-.01em}
.step p{font-size:.93rem;color:var(--muted)}
.steps-note{font-family:var(--mono);font-size:.78rem;color:var(--dim);margin-top:22px}
/* ---------- demo ---------- */
.demo-frame{
position:relative;aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;
border:1px solid var(--line);
background:
radial-gradient(110% 90% at 50% 30%, rgba(47,227,201,.07), transparent 60%),
linear-gradient(160deg,#0F131A,#0A0D12);
display:grid;place-items:center;text-align:center;
}
.demo-frame .grid-bg{position:absolute;inset:0;opacity:.4;
background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
background-size:46px 46px;-webkit-mask-image:radial-gradient(circle at 50% 50%,#000,transparent 75%);mask-image:radial-gradient(circle at 50% 50%,#000,transparent 75%)}
.play{position:relative;z-index:1;padding:20px}
.play-btn{
width:74px;height:74px;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px;
background:var(--aqua-soft);border:1px solid var(--aqua-line);color:var(--aqua);
transition:transform .2s ease, box-shadow .2s ease;
}
.demo-frame:hover .play-btn{transform:scale(1.06);box-shadow:0 0 40px -6px rgba(47,227,201,.4)}
.play h3{font-size:1.15rem;font-weight:600}
.play p{font-family:var(--mono);font-size:.78rem;color:var(--dim);margin-top:6px;letter-spacing:.04em}
/* ---------- download ---------- */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:6px}
.dl-card{
background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);
padding:30px 28px;display:flex;flex-direction:column;gap:6px;transition:border-color .2s ease,transform .2s ease;
}
.dl-card:hover{border-color:var(--aqua-line);transform:translateY(-3px)}
.dl-card .tag{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--aqua)}
.dl-card h3{font-size:1.3rem;font-weight:600;letter-spacing:-.015em;margin-top:4px}
.dl-card .file{font-family:var(--mono);font-size:.82rem;color:var(--muted);margin:2px 0 6px}
.dl-card p{font-size:.92rem;color:var(--muted);margin-bottom:18px}
.dl-card .btn{align-self:flex-start;margin-top:auto}
.dl-foot{font-family:var(--mono);font-size:.8rem;color:var(--dim);margin-top:24px;text-align:center}
.dl-foot a{color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:1px}
.dl-foot a:hover{color:var(--aqua);border-color:var(--aqua-line)}
/* ---------- status / honesty ---------- */
.status{border:1px solid var(--line);border-radius:var(--radius);background:
linear-gradient(180deg,var(--bg-elev),var(--bg));padding:clamp(34px,5vw,52px)}
.status .badge{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:.72rem;
letter-spacing:.14em;text-transform:uppercase;color:var(--amber);
background:var(--amber-soft);border:1px solid rgba(244,161,93,.3);padding:6px 12px;border-radius:99px}
.status h2{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;letter-spacing:-.02em;margin:20px 0 12px}
.status p{color:var(--muted);max-width:680px;font-size:1.02rem}
.status .row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 44px;margin-top:0}
.foot-grid{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.foot-brand{max-width:300px}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{color:var(--dim);font-size:.9rem}
.foot-links{display:flex;gap:60px;flex-wrap:wrap}
.foot-col h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin-bottom:16px;font-weight:500}
.foot-col a{display:block;color:var(--muted);font-size:.92rem;margin-bottom:11px;transition:color .2s ease}
.foot-col a:hover{color:var(--aqua)}
.foot-bottom{margin-top:48px;padding-top:24px;border-top:1px solid var(--line-soft);
display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
font-family:var(--mono);font-size:.76rem;color:var(--dim)}
/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
/* ---------- responsive ---------- */
@media (max-width:920px){
.hero-grid{grid-template-columns:1fr;gap:44px}
.hero-copy{max-width:none;order:1}
.hero-visual{order:2}
.feat-grid,.steps{grid-template-columns:1fr 1fr}
.nav-links{gap:14px}
.nav-links a.lnk{display:none}
}
@media (max-width:600px){
.wrap{padding:0 18px}
.nav-links{gap:10px}
.nav-inner .btn-primary{padding:9px 14px;font-size:.86rem}
.lang-btn{padding:6px 9px;font-size:.71rem}
.feat-grid,.steps,.dl-grid{grid-template-columns:1fr}
.foot-links{gap:36px}
.hud{max-width:none}
.hud-rows{font-size:.7rem}
}
@media (max-width:380px){
.brand-name{display:none}
}
@media (prefers-reduced-motion:reduce){
*{animation:none !important;scroll-behavior:auto !important}
.reveal{opacity:1;transform:none;transition:none}
}
</style>
</head>
<body>
<!-- ============ NAV ============ -->
<header class="nav" id="nav">
<div class="wrap nav-inner">
<a class="brand" href="#top" aria-label="UltraCast home">
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" aria-hidden="true">
<circle cx="5" cy="19" r="2.3" fill="#2FE3C9"/>
<path d="M5 12.5a6.5 6.5 0 0 1 6.5 6.5" stroke="#2FE3C9" stroke-width="2" stroke-linecap="round"/>
<path d="M5 7a12 12 0 0 1 12 12" stroke="#2FE3C9" stroke-width="2" stroke-linecap="round" opacity=".6"/>
<path d="M5 1.5A17.5 17.5 0 0 1 22.5 19" stroke="#2FE3C9" stroke-width="2" stroke-linecap="round" opacity=".3"/>
</svg>
<span class="brand-name">UltraCast</span>
</a>
<nav class="nav-links" aria-label="Primary">
<a class="lnk" href="#features" data-i18n="nav_features">Features</a>
<a class="lnk" href="#how" data-i18n="nav_how">How it works</a>
<a class="lnk" href="https://github.com/JoelPasapera/UltraCast" target="_blank" rel="noopener" data-i18n="nav_github">GitHub</a>
<div class="lang-toggle" role="group" aria-label="Language / Idioma">
<button type="button" class="lang-btn" data-lang="en">EN</button>
<button type="button" class="lang-btn" data-lang="es">ES</button>
</div>
<a class="btn btn-primary" href="#download" data-i18n="nav_download">Download</a>
</nav>
</div>
</header>
<main id="top">
<!-- ============ HERO ============ -->
<section class="hero">
<div class="wrap hero-grid">
<div class="hero-copy">
<span class="eyebrow" data-i18n="hero_eyebrow">Open source · Your Wi-Fi · Ultra-low latency</span>
<h1 data-i18n="hero_title">Low-latency screen mirroring for <span class="hl">cheap projectors</span>.</h1>
<p class="lede" data-i18n="hero_lede">Stream your Android phone to an HY300-class projector over your own Wi-Fi. A custom pipeline with error correction and congestion control keeps the picture smooth where Miracast stutters, freezes, and drops.</p>
<div class="hero-cta">
<a class="btn btn-primary btn-lg" href="#download">
<span data-i18n="hero_cta_download">Download the app</span>
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
</a>
<a class="btn btn-ghost btn-lg" href="https://github.com/JoelPasapera/UltraCast" target="_blank" rel="noopener">
<span data-i18n="hero_cta_source">View source</span>
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" aria-hidden="true"><path d="M7 17 17 7M9 7h8v8" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
</a>
</div>
<p class="hero-note" data-i18n="hero_note"><b>Two free APKs</b> · Apache-2.0 · No account, no cloud</p>
</div>
<div class="hero-visual">
<!-- The signature: a mock of what the projector shows, with the live diagnostic HUD. -->
<div class="screen" role="img" aria-label="A projector display showing the live diagnostic HUD: 60 fps, low loss, low jitter, connection healthy.">
<div class="screen-bezel"></div>
<div class="live"><span class="dot pulse"></span> <span data-i18n="hud_live">Live · mirroring</span></div>
<div class="hud">
<div class="hud-title" data-i18n="hud_quality">Quality</div>
<div class="hud-rows" data-i18n="hud_rows">
<div><span class="k">fps</span> <b>60</b></div>
<div><span class="k">bitrate</span> <b>7.8 Mb/s</b></div>
<div><span class="k">loss</span> <b>0.3%</b></div>
<div><span class="k">jitter</span> <b>2.1 ms</b></div>
<div><span class="k">FEC</span> <b>6%</b></div>
<div><span class="k">link</span> <b>ok</b></div>
</div>
<div class="bars" id="bars" aria-hidden="true"></div>
<div class="hud-foot" data-i18n="hud_foot"><span>frames OK <b style="color:var(--aqua)">1820</b></span><span>· FEC rescued <b style="color:var(--aqua)">34</b></span><span>· <span class="ok">lost 0</span></span></div>
</div>
</div>
</div>
</div>
</section>
<!-- ============ THESIS ============ -->
<section class="thesis">
<div class="wrap">
<p data-i18n="thesis_text">Miracast assumes a perfect link. Real Wi-Fi <span class="em">isn't</span> — so UltraCast measures the connection and <span class="em2">adapts, packet by packet</span>.</p>
</div>
</section>
<!-- ============ FEATURES ============ -->
<section class="sec-pad" id="features">
<div class="wrap">
<div class="sec-head reveal">
<span class="eyebrow" data-i18n="feat_eyebrow">Under the hood</span>
<h2 data-i18n="feat_h2">What makes it hold up</h2>
</div>
<div class="feat-grid">
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><path d="M13 2 4 14h6l-1 8 9-12h-6l1-8Z" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"/></svg></div>
<h3 data-i18n="card1_h3">UDP, not TCP</h3>
<p data-i18n="card1_p">A lost packet never stalls the stream. No buffering spiral, no frozen frame waiting on a retransmit.</p>
</div>
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><path d="M12 3 5 6v5c0 4.5 3 8 7 10 4-2 7-5.5 7-10V6l-7-3Z" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"/><path d="m9 12 2 2 4-4" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/></svg></div>
<h3 data-i18n="card2_h3">Error correction</h3>
<p data-i18n="card2_p">Reed–Solomon parity rebuilds lost packets on the fly — no round-trip. NEON-accelerated on 64-bit ARM.</p>
</div>
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><path d="M3 12h3l2 6 4-14 2.5 9L19 9l2 3" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/></svg></div>
<h3 data-i18n="card3_h3">Congestion control</h3>
<p data-i18n="card3_p">Tells real congestion from radio interference, and only drops quality when the link is actually full — the same idea WebRTC uses.</p>
</div>
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><path d="M4 7h10M18 7h2M4 17h2M10 17h10" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/><circle cx="16" cy="7" r="2.4" stroke="currentColor" stroke-width="1.8"/><circle cx="8" cy="17" r="2.4" stroke="currentColor" stroke-width="1.8"/></svg></div>
<h3 data-i18n="card4_h3">Adaptive bitrate</h3>
<p data-i18n="card4_p">Quality rises and falls with the network, live — without ever restarting the stream.</p>
</div>
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><rect x="3" y="5" width="18" height="14" rx="2" stroke="currentColor" stroke-width="1.8"/><path d="M3 9h18M8 5v14M16 5v14" stroke="currentColor" stroke-width="1.8"/></svg></div>
<h3 data-i18n="card5_h3">Content-adaptive frame rate</h3>
<p data-i18n="card5_p">Full motion when it counts, near-silent on a still slide. Your battery and your Wi-Fi both notice.</p>
</div>
<div class="card reveal">
<div class="ic"><svg width="22" height="22" viewBox="0 0 24 24" fill="none"><path d="M3 12h4l2-6 3 14 3-10 2 4 4-2" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/></svg></div>
<h3 data-i18n="card6_h3">Live diagnostics</h3>
<p data-i18n="card6_p">An on-screen HUD shows fps, loss, jitter, and recovery in real time. You can watch it working.</p>
</div>
</div>
</div>
</section>
<!-- ============ HOW IT WORKS ============ -->
<section class="sec-pad" id="how" style="background:var(--bg-elev);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)">
<div class="wrap">
<div class="sec-head reveal">
<span class="eyebrow" data-i18n="how_eyebrow">Three steps</span>
<h2 data-i18n="how_h2">How it works</h2>
</div>
<div class="steps">
<div class="step reveal">
<span class="num">01</span>
<h3 data-i18n="step1_h3">Install on the projector</h3>
<p data-i18n="step1_p">Sideload the receiver APK once. Leave it running — it waits fullscreen for your phone.</p>
</div>
<div class="step reveal">
<span class="num">02</span>
<h3 data-i18n="step2_h3">Install on the phone</h3>
<p data-i18n="step2_p">Install the sender APK and grant screen capture when Android asks.</p>
</div>
<div class="step reveal">
<span class="num">03</span>
<h3 data-i18n="step3_h3">Cast</h3>
<p data-i18n="step3_p">It finds the projector on your network and mirrors your screen. That's it.</p>
</div>
</div>
<p class="steps-note reveal" data-i18n="steps_note">Both devices on the same Wi-Fi. The projector sideload steps are in the <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener" style="color:var(--aqua)">README</a>.</p>
</div>
</section>
<!-- ============ DEMO ============ -->
<section class="sec-pad" id="demo">
<div class="wrap">
<div class="sec-head reveal">
<span class="eyebrow" data-i18n="demo_eyebrow">See for yourself</span>
<h2 data-i18n="demo_h2">UltraCast next to Miracast</h2>
</div>
<!--
▶ TO ADD THE VIDEO: replace this whole .demo-frame block with a YouTube embed or a local file:
<div style="position:relative;aspect-ratio:16/9;border-radius:16px;overflow:hidden;border:1px solid var(--line)">
<iframe width="100%" height="100%" src="https://www.youtube.com/embed/VIDEO_ID" title="UltraCast vs Miracast" frameborder="0" allowfullscreen></iframe>
</div>
-->
<div class="demo-frame reveal" role="img" aria-label="Demo video coming soon: a side-by-side comparison of UltraCast and Miracast on the same Wi-Fi.">
<div class="grid-bg"></div>
<div class="play">
<div class="play-btn"><svg width="28" height="28" viewBox="0 0 24 24" fill="currentColor"><path d="M8 5v14l11-7z"/></svg></div>
<h3 data-i18n="demo_play_h3">Side-by-side demo</h3>
<p data-i18n="demo_play_p">Coming soon — same Wi-Fi, same screen</p>
</div>
</div>
</div>
</section>
<!-- ============ DOWNLOAD ============ -->
<section class="sec-pad" id="download" style="background:var(--bg-elev);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)">
<div class="wrap">
<div class="sec-head reveal" style="margin-bottom:36px">
<span class="eyebrow" data-i18n="dl_eyebrow">Free & open source</span>
<h2 data-i18n="dl_h2">Get UltraCast</h2>
</div>
<div class="dl-grid">
<!-- Direct links are pinned to v0.1.0. On a new release, update the version in both URLs. -->
<div class="dl-card reveal">
<span class="tag" data-i18n="dl1_tag">For your phone</span>
<h3 data-i18n="dl1_h3">Sender</h3>
<div class="file">ultracast-sender.apk</div>
<p data-i18n="dl1_p">Install it like a normal app. This is the device whose screen you want to mirror.</p>
<a class="btn btn-primary" href="https://github.com/JoelPasapera/UltraCast/releases/download/v0.1.0/ultracast-sender.apk">
<span data-i18n="dl1_btn">Download APK</span>
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
</a>
</div>
<div class="dl-card reveal">
<span class="tag" data-i18n="dl2_tag">For your projector</span>
<h3 data-i18n="dl2_h3">Receiver</h3>
<div class="file">ultracast-receiver.apk</div>
<p data-i18n="dl2_p">Sideload it via a USB drive — most cheap projectors need this once. Then leave it running.</p>
<a class="btn btn-primary" href="https://github.com/JoelPasapera/UltraCast/releases/download/v0.1.0/ultracast-receiver.apk">
<span data-i18n="dl2_btn">Download APK</span>
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
</a>
</div>
</div>
<p class="dl-foot reveal" data-i18n="dl_foot">v0.1.0 · experimental · <a href="https://github.com/JoelPasapera/UltraCast/releases" target="_blank" rel="noopener">all releases</a> · <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener">install guide</a></p>
</div>
</section>
<!-- ============ STATUS / HONESTY ============ -->
<section class="sec-pad" id="status">
<div class="wrap">
<div class="status reveal">
<span class="badge" data-i18n="status_badge">● Early days</span>
<h2 data-i18n="status_h2">Honest status</h2>
<p data-i18n="status_p">UltraCast is v0.1.0 and experimental, tested so far on a single phone-and-projector pair. It's H.264 and local-network only, with no audio yet. It's built in the open — if you try it on different hardware, a quick report genuinely helps it get better.</p>
<div class="row">
<a class="btn btn-primary" href="https://github.com/JoelPasapera/UltraCast/issues" target="_blank" rel="noopener" data-i18n="status_btn1">Report your device</a>
<a class="btn btn-ghost" href="https://github.com/JoelPasapera/UltraCast#limitations" target="_blank" rel="noopener" data-i18n="status_btn2">Read the limitations</a>
</div>
</div>
</div>
</section>
</main>
<!-- ============ FOOTER ============ -->
<footer>
<div class="wrap">
<div class="foot-grid">
<div class="foot-brand">
<a class="brand" href="#top">
<svg width="22" height="22" viewBox="0 0 24 24" fill="none" aria-hidden="true">
<circle cx="5" cy="19" r="2.3" fill="#2FE3C9"/>
<path d="M5 12.5a6.5 6.5 0 0 1 6.5 6.5" stroke="#2FE3C9" stroke-width="2" stroke-linecap="round"/>
<path d="M5 7a12 12 0 0 1 12 12" stroke="#2FE3C9" stroke-width="2" stroke-linecap="round" opacity=".6"/>
</svg>
<span class="brand-name">UltraCast</span>
</a>
<p data-i18n="foot_brand_p">Low-latency screen mirroring for cheap projectors. Built in the open.</p>
</div>
<div class="foot-links">
<div class="foot-col">
<h4 data-i18n="foot_col1_h4">Project</h4>
<a href="https://github.com/JoelPasapera/UltraCast" target="_blank" rel="noopener" data-i18n="foot_repo">GitHub repo</a>
<a href="https://github.com/JoelPasapera/UltraCast/releases" target="_blank" rel="noopener" data-i18n="foot_releases">Releases</a>
<a href="https://github.com/JoelPasapera/UltraCast/blob/main/LICENSE" target="_blank" rel="noopener" data-i18n="foot_license">License (Apache-2.0)</a>
</div>
<div class="foot-col">
<h4 data-i18n="foot_col2_h4">Help</h4>
<a href="https://github.com/JoelPasapera/UltraCast#readme" target="_blank" rel="noopener" data-i18n="foot_docs">Documentation</a>
<a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener" data-i18n="foot_install">Install guide</a>
<a href="https://github.com/JoelPasapera/UltraCast/issues" target="_blank" rel="noopener" data-i18n="foot_issue">Report an issue</a>
</div>
</div>
</div>
<div class="foot-bottom">
<span data-i18n="foot_built">Built with C++ & Kotlin.</span>
<span data-i18n="foot_affil">Not affiliated with any projector manufacturer.</span>
</div>
</div>
</footer>
<script>
// ---------- Translations (EN / ES) ----------
var I18N = {
en: {
nav_features:`Features`,
nav_how:`How it works`,
nav_github:`GitHub`,
nav_download:`Download`,
hero_eyebrow:`Open source · Your Wi-Fi · Ultra-low latency`,
hero_title:`Low-latency screen mirroring for <span class="hl">cheap projectors</span>.`,
hero_lede:`Stream your Android phone to an HY300-class projector over your own Wi-Fi. A custom pipeline with error correction and congestion control keeps the picture smooth where Miracast stutters, freezes, and drops.`,
hero_cta_download:`Download the app`,
hero_cta_source:`View source`,
hero_note:`<b>Two free APKs</b> · Apache-2.0 · No account, no cloud`,
hud_live:`Live · mirroring`,
hud_quality:`Quality`,
hud_rows:`<div><span class="k">fps</span> <b>60</b></div><div><span class="k">bitrate</span> <b>7.8 Mb/s</b></div><div><span class="k">loss</span> <b>0.3%</b></div><div><span class="k">jitter</span> <b>2.1 ms</b></div><div><span class="k">FEC</span> <b>6%</b></div><div><span class="k">link</span> <b>ok</b></div>`,
hud_foot:`<span>frames OK <b style="color:var(--aqua)">1820</b></span><span>· FEC rescued <b style="color:var(--aqua)">34</b></span><span>· <span class="ok">lost 0</span></span>`,
thesis_text:`Miracast assumes a perfect link. Real Wi-Fi <span class="em">isn't</span> — so UltraCast measures the connection and <span class="em2">adapts, packet by packet</span>.`,
feat_eyebrow:`Under the hood`,
feat_h2:`What makes it hold up`,
card1_h3:`UDP, not TCP`,
card1_p:`A lost packet never stalls the stream. No buffering spiral, no frozen frame waiting on a retransmit.`,
card2_h3:`Error correction`,
card2_p:`Reed–Solomon parity rebuilds lost packets on the fly — no round-trip. NEON-accelerated on 64-bit ARM.`,
card3_h3:`Congestion control`,
card3_p:`Tells real congestion from radio interference, and only drops quality when the link is actually full — the same idea WebRTC uses.`,
card4_h3:`Adaptive bitrate`,
card4_p:`Quality rises and falls with the network, live — without ever restarting the stream.`,
card5_h3:`Content-adaptive frame rate`,
card5_p:`Full motion when it counts, near-silent on a still slide. Your battery and your Wi-Fi both notice.`,
card6_h3:`Live diagnostics`,
card6_p:`An on-screen HUD shows fps, loss, jitter, and recovery in real time. You can watch it working.`,
how_eyebrow:`Three steps`,
how_h2:`How it works`,
step1_h3:`Install on the projector`,
step1_p:`Sideload the receiver APK once. Leave it running — it waits fullscreen for your phone.`,
step2_h3:`Install on the phone`,
step2_p:`Install the sender APK and grant screen capture when Android asks.`,
step3_h3:`Cast`,
step3_p:`It finds the projector on your network and mirrors your screen. That's it.`,
steps_note:`Both devices on the same Wi-Fi. The projector sideload steps are in the <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener" style="color:var(--aqua)">README</a>.`,
demo_eyebrow:`See for yourself`,
demo_h2:`UltraCast next to Miracast`,
demo_play_h3:`Side-by-side demo`,
demo_play_p:`Coming soon — same Wi-Fi, same screen`,
dl_eyebrow:`Free & open source`,
dl_h2:`Get UltraCast`,
dl1_tag:`For your phone`,
dl1_h3:`Sender`,
dl1_p:`Install it like a normal app. This is the device whose screen you want to mirror.`,
dl1_btn:`Download APK`,
dl2_tag:`For your projector`,
dl2_h3:`Receiver`,
dl2_p:`Sideload it via a USB drive — most cheap projectors need this once. Then leave it running.`,
dl2_btn:`Download APK`,
dl_foot:`v0.1.0 · experimental · <a href="https://github.com/JoelPasapera/UltraCast/releases" target="_blank" rel="noopener">all releases</a> · <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener">install guide</a>`,
status_badge:`● Early days`,
status_h2:`Honest status`,
status_p:`UltraCast is v0.1.0 and experimental, tested so far on a single phone-and-projector pair. It's H.264 and local-network only, with no audio yet. It's built in the open — if you try it on different hardware, a quick report genuinely helps it get better.`,
status_btn1:`Report your device`,
status_btn2:`Read the limitations`,
foot_brand_p:`Low-latency screen mirroring for cheap projectors. Built in the open.`,
foot_col1_h4:`Project`,
foot_repo:`GitHub repo`,
foot_releases:`Releases`,
foot_license:`License (Apache-2.0)`,
foot_col2_h4:`Help`,
foot_docs:`Documentation`,
foot_install:`Install guide`,
foot_issue:`Report an issue`,
foot_built:`Built with C++ & Kotlin.`,
foot_affil:`Not affiliated with any projector manufacturer.`
},
es: {
nav_features:`Funciones`,
nav_how:`Cómo funciona`,
nav_github:`GitHub`,
nav_download:`Descargar`,
hero_eyebrow:`Open source · Tu Wi-Fi · Latencia ultrabaja`,
hero_title:`Duplicación de pantalla de baja latencia para <span class="hl">proyectores baratos</span>.`,
hero_lede:`Transmite la pantalla de tu teléfono Android a un proyector tipo HY300 por tu propia red Wi-Fi. Un sistema propio con corrección de errores y control de congestión mantiene la imagen fluida ahí donde Miracast se traba, se congela y se corta.`,
hero_cta_download:`Descargar la app`,
hero_cta_source:`Ver el código`,
hero_note:`<b>Dos APK gratis</b> · Apache-2.0 · Sin cuenta, sin nube`,
hud_live:`En vivo · proyectando`,
hud_quality:`Calidad`,
hud_rows:`<div><span class="k">fps</span> <b>60</b></div><div><span class="k">bitrate</span> <b>7.8 Mb/s</b></div><div><span class="k">pérdida</span> <b>0.3%</b></div><div><span class="k">jitter</span> <b>2.1 ms</b></div><div><span class="k">FEC</span> <b>6%</b></div><div><span class="k">enlace</span> <b>ok</b></div>`,
hud_foot:`<span>cuadros OK <b style="color:var(--aqua)">1820</b></span><span>· FEC recuperó <b style="color:var(--aqua)">34</b></span><span>· <span class="ok">perdidos 0</span></span>`,
thesis_text:`Miracast da por hecho un enlace perfecto. El Wi-Fi real <span class="em">no lo es</span> — por eso UltraCast mide la conexión y <span class="em2">se adapta, paquete por paquete</span>.`,
feat_eyebrow:`Por dentro`,
feat_h2:`Por qué aguanta`,
card1_h3:`UDP, no TCP`,
card1_p:`Un paquete perdido nunca frena la transmisión. Sin espirales de buffering, sin imagen congelada esperando un reenvío.`,
card2_h3:`Corrección de errores`,
card2_p:`La paridad Reed–Solomon reconstruye los paquetes perdidos al vuelo, sin viajes de ida y vuelta. Acelerada con NEON en ARM de 64 bits.`,
card3_h3:`Control de congestión`,
card3_p:`Distingue la congestión real de la interferencia de radio, y solo baja la calidad cuando el enlace está de verdad saturado — la misma idea que usa WebRTC.`,
card4_h3:`Bitrate adaptativo`,
card4_p:`La calidad sube y baja con la red, en vivo, sin reiniciar nunca la transmisión.`,
card5_h3:`Fotogramas según el contenido`,
card5_p:`Movimiento pleno cuando importa, casi en reposo en una diapositiva fija. Tu batería y tu Wi-Fi lo agradecen.`,
card6_h3:`Diagnóstico en vivo`,
card6_p:`Un HUD en pantalla muestra fps, pérdida, jitter y recuperación en tiempo real. Puedes verlo trabajar.`,
how_eyebrow:`Tres pasos`,
how_h2:`Cómo funciona`,
step1_h3:`Instala en el proyector`,
step1_p:`Instala el APK receptor una vez (sideload). Déjalo abierto: espera a pantalla completa a que llegue tu teléfono.`,
step2_h3:`Instala en el teléfono`,
step2_p:`Instala el APK emisor y concede la captura de pantalla cuando Android lo pida.`,
step3_h3:`Proyecta`,
step3_p:`Encuentra el proyector en tu red y duplica tu pantalla. Eso es todo.`,
steps_note:`Ambos dispositivos en la misma red Wi-Fi. Los pasos para instalar en el proyector (sideload) están en el <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener" style="color:var(--aqua)">README</a>.`,
demo_eyebrow:`Compruébalo tú mismo`,
demo_h2:`UltraCast al lado de Miracast`,
demo_play_h3:`Demo lado a lado`,
demo_play_p:`Próximamente — misma Wi-Fi, misma pantalla`,
dl_eyebrow:`Gratis y open source`,
dl_h2:`Descarga UltraCast`,
dl1_tag:`Para tu teléfono`,
dl1_h3:`Emisor`,
dl1_p:`Instálalo como una app normal. Es el dispositivo cuya pantalla quieres duplicar.`,
dl1_btn:`Descargar APK`,
dl2_tag:`Para tu proyector`,
dl2_h3:`Receptor`,
dl2_p:`Instálalo por USB (sideload) — la mayoría de los proyectores baratos lo necesitan una vez. Luego déjalo abierto.`,
dl2_btn:`Descargar APK`,
dl_foot:`v0.1.0 · experimental · <a href="https://github.com/JoelPasapera/UltraCast/releases" target="_blank" rel="noopener">todas las versiones</a> · <a href="https://github.com/JoelPasapera/UltraCast#installing" target="_blank" rel="noopener">guía de instalación</a>`,
status_badge:`● Primeros pasos`,
status_h2:`El estado real del proyecto`,
status_p:`UltraCast es v0.1.0 y experimental, probado hasta ahora en un solo par de teléfono y proyector. Funciona solo con H.264 y en red local, y todavía no tiene audio. Está hecho a la vista de todos — si lo pruebas en otro hardware, un reporte corto ayuda muchísimo a mejorarlo.`,
status_btn1:`Reporta tu dispositivo`,
status_btn2:`Lee las limitaciones`,
foot_brand_p:`Duplicación de pantalla de baja latencia para proyectores baratos. Hecho a la vista de todos.`,
foot_col1_h4:`Proyecto`,
foot_repo:`Repositorio`,
foot_releases:`Versiones`,
foot_license:`Licencia (Apache-2.0)`,
foot_col2_h4:`Ayuda`,
foot_docs:`Documentación`,
foot_install:`Guía de instalación`,
foot_issue:`Reportar un problema`,
foot_built:`Hecho con C++ y Kotlin.`,
foot_affil:`Sin afiliación con ningún fabricante de proyectores.`
}
};
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