Downloads
Here you always find the latest version of Lethe.
Lethe
↓ Download APK v10.4.173
Android 8.0+ (API 26) only · Sideloading required
Open Source (GPL-3.0) · Community repository · Coming soon to the official F-Droid store
Installation guide
Allow sideloading
Go to Settings → Security → Unknown sources and enable permission for your browser or file manager. From Android 8 the dialog appears automatically.
Disable battery optimization
For reliable background notifications: Settings → Battery → Lethe → Don't optimize. On Xiaomi/Huawei/Samsung there are additional power-saving modes.