sleep-timer

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A fancy Android app that pauses / fades out music, disables things like WiFi and Bluetooth when the timer ends

sleep-timer 최신버젼 다운로드

최종 버전 다운로드 (.zip)

// repository documentation

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# SleepTimer

> [!Warning]
> Because Google decided to lock down Android as of September 2026, this app will stop working soon (without a setting that could be removed at any time). If you want to avoid that, sign the petition and hope for the best. For more details read here: https://keepandroidopen.org/
> 
> **Update**: Google made some changes to the date and affected app stores. This luckily means that it's likely this app will continue to work for now.

A fancy sleep timer for Android. Starts a countdown that
stops media playback, fades audio out, and optionally locks the screen when it
ends — so you can fall asleep without your phone draining the battery or
blaring podcasts at 3 AM.

No accounts, no ads, no trackers, no network access.

## Features

- Simple countdown timer with `+step`, `−step` and cancel actions directly
  from the notification (step is configurable, defaults to 5 min)
- Shows the exact wall-clock time at which the timer will end
- Stops audio and video playback across apps at the end of the timer
- Configurable fade-out duration before playback stops
- Optional screen lock when the timer ends — choose between **Device Admin**
  (standard Android lock, credential required to unlock) or **Shizuku soft
  lock** (simulates the power button, biometric unlock keeps working)
- Optional Wi-Fi and Bluetooth off when the timer ends (both via Shizuku,
  since modern Android blocks apps from toggling these directly)
- Six built-in themes (Midnight, Ocean, Ember, Light, Basic, AMOLED) with an
  optional drifting starfield behind the dial
- Haptic feedback for timer controls (can be disabled)
- Foreground service keeps the timer reliable even when the app is in the
  background
- English and German translations

## Screenshots

| Timer running | Settings | Themes |
|---|---|---|
| ![Timer running with notification actions](https://raw.githubusercontent.com/Xitee1/sleep-timer/main/docs/screenshots/timer-running.png) | ![Settings screen](https://raw.githubusercontent.com/Xitee1/sleep-timer/main/docs/screenshots/settings.png) | ![Theme picker](https://raw.githubusercontent.com/Xitee1/sleep-timer/main/docs/screenshots/themes.png) |

## Permissions

| Permission | Why it is needed |
|---|---|
| `FOREGROUND_SERVICE` + `FOREGROUND_SERVICE_MEDIA_PLAYBACK` | Keeps the countdown running reliably in the background so it fires on time |
| `POST_NOTIFICATIONS` | Shows the running timer with quick actions (+/− step, cancel) |
| `BIND_DEVICE_ADMIN` (optional, `force-lock` only) | Required by Android to lock the screen when the timer ends — only requested if you pick the Device Admin lock method |

The app declares a `ShizukuProvider` so it can talk to
[Shizuku](https://shizuku.rikka.app/) when you enable the Wi-Fi off,
Bluetooth off, or soft-lock features. Shizuku is **optional** — the core
timer works without it, and the provider is dormant until you opt in.

The app does not request the `INTERNET` permission. It cannot connect to any
network.

## Privacy

- No analytics, crash reporting, or telemetry
- No third-party SDKs (no Firebase, no Google Play Services, no ads)
- All settings are stored locally on your device using Jetpack DataStore
- No data leaves your device

## Installation

### F-Droid

SleepTimer is available on [F-Droid](https://f-droid.org/packages/dev.xitee.sleeptimer/):

[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png" alt="Get it on F-Droid" height="80">](https://f-droid.org/packages/dev.xitee.sleeptimer/)

### GitHub Releases

Signed APKs are published on the [Releases page](https://github.com/Xitee1/sleep-timer/releases).

## Building from source

Requirements:

- JDK 17
- Android SDK with platform 36 (`compileSdk`)
- `minSdk` is 26 (Android 8.0)

```sh
./gradlew assembleRelease
```

The build is fully reproducible from this repository using a 100% FLOSS
toolchain — no proprietary dependencies, no binary blobs.

### Project structure

- `app/` — Android application module, entry points, DI wiring
- `core/data/` — settings and timer state (DataStore + repository pattern)
- `core/service/` — foreground service managing the countdown and playback control
- `feature/timer/` — Jetpack Compose UI for the timer and settings screens

Written in Kotlin with Jetpack Compose, Hilt (DI) and kotlinx.serialization.

## Contributing

Issues and pull requests are welcome at
<https://github.com/Xitee1/sleep-timer>.

## License

SleepTimer is free software licensed under the
**GNU General Public License, version 3 or later**. See [LICENSE](LICENSE) for
the full text.

This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
```

sleep-timer

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