Tam Vakti

Plan your time. Never miss the moment.

A focused productivity app that brings reminders, habit tracking, weather and multiple stopwatches together.

About the app

Tam Vakti is designed for people who want a simple way to organize daily plans, important moments and focus sessions. Reminders can be created with a date, time, note and priority. The home screen keeps the next events visible without turning the app into a crowded task manager.

The current Android release is available on Google Play.

Highlights

• Date- and time-based reminders with three priority levels
• Native Android alarms with snooze support
• Voice input for quickly entering reminder titles
• Habit tracking with daily, weekly and monthly schedules
• Archive for completed reminders
• Multiple stopwatches running at the same time
• Foreground service support for background stopwatch sessions
• Location-based weather with manual location selection
• Configurable notification and alarm sounds
• Light and dark themes
• Localization for Afrikaans, Arabic, German, Greek, English, Spanish, French, Hindi, Japanese, Portuguese, Russian, Turkish and Chinese

Screenshots

The latest release uses a separate reminder editor so the home screen stays clean and easy to scan.

Technology stack

Area	Technology
Application framework	.NET 10 and .NET MAUI for Android
Language	C#
User interface	XAML, MAUI Controls and custom styles
Platform	Android 5.0+ (API 21+)
Distribution	Google Play via Android App Bundle
Application structure	Dependency injection, service abstractions and Android-specific implementations
Android integration	AlarmManager, BroadcastReceiver, Foreground Service and SpeechRecognizer
Device APIs	Geolocation, Preferences and local notifications
Networking	HttpClient-based weather and location requests
Persistence	Local JSON state and device preferences
Localization	Culture-aware resources for 13 languages
Release build	R8 shrinking and Android App Bundle

Architecture

The interface and application services are built with .NET MAUI for Android. Native features such as alarms, speech recognition and background stopwatch notifications are exposed through small interfaces and implemented in the Android platform layer.

Android MAUI pages and controls
        │
View models and application services
        │
Models, local storage and HTTP services
        │
Platform contracts
        │
Android alarms, receivers, speech and foreground services

Code samples

The samples directory contains a small, buildable Android project that mirrors the main layers of Tam Vakti. It is more than a collection of disconnected snippets: the reminder editor, validation, local storage and Android alarm implementation form one readable flow.

samples/
|-- AppBootstrap.cs
|-- TamVakti.Sample.csproj
|-- Converters/
|   `-- ImportanceColorConverter.cs
|-- Models/
|   |-- Habit.cs
|   |-- Reminder.cs
|   |-- ReminderDraft.cs
|   |-- StopwatchTimer.cs
|   `-- WeatherSnapshot.cs
|-- Platforms/Android/
|   |-- AndroidManifest.xml
|   |-- AndroidReminderScheduler.cs
|   `-- ReminderReceiver.cs
|-- Services/
|   |-- IReminderScheduler.cs
|   |-- IReminderStore.cs
|   |-- JsonReminderStore.cs
|   |-- ReminderRecurrence.cs
|   |-- ReminderService.cs
|   |-- ThemeManager.cs
|   `-- WeatherClient.cs
|-- ViewModels/
|   |-- ReminderEditorViewModel.cs
|   |-- ReminderListViewModel.cs
|   `-- StopwatchViewModel.cs
`-- Views/
    |-- ReminderCard.xaml
    |-- ReminderEditorPage.xaml
    `-- ReminderEditorPage.xaml.cs

Reminder creation flow

The reminder example follows the same separation used throughout the app:

1. ReminderEditorPage contains the Android-friendly MAUI form and binds user input to ReminderEditorViewModel.
2. ReminderDraft combines the selected date and time, normalizes the input and returns field-level validation errors.
3. ReminderService asks for notification permission, schedules the Android alarm and then persists the reminder. If saving fails, it cancels the alarm so storage and Android do not drift apart.
4. AndroidReminderScheduler creates a stable PendingIntent and chooses the correct AlarmManager method for the installed Android version.
5. ReminderReceiver receives the broadcast and displays it through a high-priority notification channel.

The orchestration remains deliberately straightforward:

var errors = draft.Validate(DateTimeOffset.Now);
if (errors.Count > 0)
{
    throw new ReminderValidationException(errors);
}

var reminder = draft.ToReminder();
await scheduler.ScheduleAsync(reminder, cancellationToken);

try
{
    var items = (await store.LoadAsync(cancellationToken)).ToList();
    items.Add(reminder);
    await store.SaveAsync(items, cancellationToken);
}
catch
{
    await scheduler.CancelAsync(reminder.Id, CancellationToken.None);
    throw;
}

Other examples

• ReminderRecurrence advances daily, weekly and monthly reminders without skipping overdue occurrences or drifting at the end of a month.
• JsonReminderStore protects local state with a semaphore and replaces the data file atomically after serialization.
• WeatherClient maps a focused Open-Meteo response into an app-facing weather model.
• StopwatchTimer keeps accumulated time and lap splits independent from the UI refresh interval.
• StopwatchViewModel manages several running timers with one lightweight dispatcher timer.
• ThemeManager applies and remembers the user's light or dark appearance preference.
• AppBootstrap shows how platform contracts, services, view models and pages are registered with dependency injection.

The sample project can be checked with:

dotnet build samples/TamVakti.Sample.csproj -c Release

These examples are intentionally selected. The complete production UI, background stopwatch service, localization catalog, store configuration and proprietary application logic are not published here.

Repository scope

This is a product showcase with selected code samples, not the full open-source repository of Tam Vakti.

• Production source code and proprietary application logic are not included.
• Signing keys, API credentials, APK/AAB packages and build outputs are excluded.
• Code under samples/ is independent and safe to reuse under the MIT License.
• Screenshots, the app icon and other brand assets are provided only to present the product.

Privacy

The app's current privacy policy is available in PRIVACY.md. The published policy is kept in Turkish to match the current store listing.

License

Source code under samples/ is available under the MIT License. The Tam Vakti name, app icon, screenshots and other visual assets are not covered by the MIT License. See ASSETS_LICENSE.md for details.

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View Tam Vakti on Google Play