Clock31 is an open-source (GPL-3.0-only) Android app by Federico Dossena. The APK we host is 39 KB, it needs Android 5.0 or newer, and it declares 4 permissions.
The file on this page is Clock31 1.0.3, 39.40 KB, and it installs on Android 5.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time com.dosse.clock31 entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.
The manifest inside the APK declares 4 permissions, none of which cover contacts, location, SMS, the camera or the microphone.
Its licence is GPL-3.0-only. We took this build from F-Droid, and the source for this exact version is linked below.
The most recent release upstream is from Feb 12, 2023, over 3 years ago. It still installs; it is simply not being updated.
We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.
- Version
- 1.0.3
- Size
- 39.40 KB
- Requires Android
- API 21
- Package
- com.dosse.clock31
- Signature checked on
- Sep 21, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: 02f0465f6af48fffddf0c5969f3f3dc73611a3bc8d6d5753cffadc8adb51d82f
Signing certificate (SHA-256): a7bbe156479131d86eaa298e44f1b5f93612f66665e8ef7c604559ce3eaf2caa
We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.
Declared permissions
- READ_CALENDAR
- RECEIVE_BOOT_COMPLETED
- WAKE_LOCK
- SET_ALARM
Screenshots
