Knotty is a unofficial e621 Android app for browsing e621.
There were a handful of E621 apps but what really inspired me was Yiffer by EchoTiger, Thanks for making such a great app!
Built for people who just want a chill app experience and notifications for pools.
- Tag and pool update notifications
- E621 wrapped:Like Spotify wrapped but for E621, it'll show you information about your favorites and your topped viewed tags
- Fullscreen swiping, swipe between posts even in fullscreen perfect for pools!
- Blacklist Syncing: sync your blacklist both ways to and from e621
- Batch Downloads and Pool Downloads
- App lock
- Inapp updates
- Achievements
- Recommended section(Uses Wrapped)
- Status Checker(See if e621 is down for Maintenance or just down lol)
- UPLOADS(IN BATCH)
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Multi-tab search, so you can keep different searches open
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Infinite scrolling
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Tag autocomplete while typing
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A search builder for common filters like order:score
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Search history
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Undo and redo for recent searches(See above photo in the search bar)
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Flow grid, vertical, and Infinity feed layouts. Infinity can even go up to 5x column mode
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Viewed-post indicators so you know what you've opened
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- Open posts in a detail page
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Swipe left and right between posts including in fullscreen(Perfect for pools)
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Fullscreen media viewer
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Dark, Light, Midnight, AMOLED, Cursed, Cursed Dark and Pride(Light theme)
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Set photos on E6 as a background for the app
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Pinch zoom, panning, and double-tap zoom
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Preloads nearby posts so swiping feels smoother
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Shows post descriptions
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Shows parent and child posts
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Shows pool membership when a post belongs to pools
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Smooth transitions
- Images(WOW)
- Autoplaying GIFs
- Videos with WebM / MP4 playback
- Save media to gallery, share the post link and use the built in android app sharer.
- Download manager with active, completed, and failed downloads
- Batch downloads
- Full pool downloads
- Login with e621 API key
- API key is stored securely with encryption
- If your account has edit permissions, you can edit post details!
- Favorite and unfavorite posts
- Upvote and downvote posts
- Upvote and downvote comments
- Better syncing with votes made on the website
- Flag Posts and comments
- Two way blacklist syncing
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- Rating filters for Safe, Questionable, and Explicit content
- Custom tag blacklist
- Long-press tags to quickly add them to the blacklist
- Tag category coloring
- Tag sorting by importance:
- Artists
- Characters
- Species
- Copyright
- General / Meta
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Browse pools, user sets, Users, and Artists
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Artist Page
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Open pools and sets as their own tabs
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Pool cover thumbnails
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Pool and tag subscription support
Knotty can watch tag searches and pools for new posts.
You can:
- Subscribe to tag searches
- Subscribe to pool IDs / comics
- Manually add subscriptions
- On demand checks
- Get notified when newer matching posts are found
- Manage subscriptions
What inspired me with this was https://github.com/Mormonara/e621-Wrapped I am using their tag implications and interests.json!
Knotty has a Wrapped-style stats screen for your favorites and viewed posts. It will read the last 50 pages of your favorites! Thats 2000 pictures and lists those tags, the app keeps tracks of posts you've viewed while using it(Locally) and displays that information(There is more than what is shown in the photo however I cannot show that as it is NSFW.

It can show things like:
- Top tags
- Top artists
- Top species
- Top characters
- Rating breakdowns
- File types
- Highest-score favorite
- Monthly viewed stats
Basically, it tells you what your taste looks like.
Good luck with that information...you'll probably need it
- Offline cache for search results
- Offline cache for favorites
- Cached post metadata
- Previously loaded pages can reopen without internet
- Viewed-post tracking
- download history
Knotty can export and restore your app data as a JSON backup.
Backups will include:
- Settings
- Tabs
- Search History
- Viewed posts
- Subscriptions
- Download history
- Login
Heads up: backups WILL include your API key, so treat backup files like passwords.
Knotty can be locked behind:
- Fingerprint
- Face unlock
- Whatever you useto unlock your screen
Nice for keeping people OUT.
- In app updater and checker
- Release notes in-app