Fossify Clock
by Fossify · GPL-3.0-only · open source
An open-source clock app that carries on from Simple Clock: alarms with gradual volume and an adjustable snooze, a world clock, timers, a stopwatch and widgets.
Needs:No root · Android 8.0+
2113 Apps is independent, not affiliated with or endorsed by Fossify. Official sources: source code on GitHub.
- Version
- 1.6.0
- Size
- 9.1 MB
- Requires
- Android 8.0+
- Updated
- 2026-01-31
Screenshots
Introduction
Fossify Clock is an open-source clock app from Fossify, the community project that took over the Simple Mobile Tools apps after they were discontinued in late 2023. It carries on from Simple Clock, under a package name of its own, so it installs as a separate app. Fossify labels it beta, which it says means testing and development are still under way.
What it does
From the project’s README, website and changelog:
- Alarms on the days you choose, with a label, your own ringtone, vibration, a volume that rises gradually and an adjustable snooze. On the alarm screen, swipe right to dismiss or left to snooze.
- A world clock with the cities you add, and labels of your own for time zones.
- Timers, several at once, and a stopwatch whose laps you can sort.
- Widgets with an analogue or a digital clock.
- Import and export of alarms and timers, a choice of 12- or 24-hour time, and the first day of the week.
- Notifications for alarms you missed or that were replaced.
Before you rely on it
- One confirmed alarm bug: a one-time alarm set for the next day can slip by another day if the phone restarts after midnight. Fossify’s maintainer has confirmed it and it is marked as urgent, but version 1.6.0, from January 2026, is still the latest release.
- Its 12 permissions include exact alarms, full-screen notifications and display over other apps, most likely so that an alarm can take over the screen when it rings.
About this file
- This is Fossify’s own build, delivered through IzzyOnDroid and signed by Fossify. It is byte for byte the APK on the project’s GitHub release and the one F-Droid distributes, and IzzyOnDroid rebuilt it from the source code and got the same file.
- Fossify says its Google Play and F-Droid releases use the same package name and signing key, so this file can be installed over the Play version when it is the same version or newer.
- The APK doesn’t request internet access. The 9.1 MB file runs on Android 8.0 and later.
What’s inside the APK
Trackers
No code matching the Exodus Privacy tracker signatures.
Native code
Runs on 64-bit and older 32-bit ARM phones.
Android versions
Built for Android 16 (target API 36).
Permissions
1 of them need your approval first.
CPU types in this build: arm64-v8a (64-bit ARM, almost every phone since 2017); armeabi-v7a (32-bit ARM, older and budget phones); x86 (32-bit Intel, emulators); x86_64 (64-bit Intel, emulators and Chromebooks).
Asks you first (1)
Android shows a prompt before the app can use these.
- Show notifications (Android 13+) · POST_NOTIFICATIONS
You switch these on in Settings (2)
Special app access. Nothing is granted until you turn it on yourself.
- Alarms and reminders · SCHEDULE_EXACT_ALARM
- Display over other apps · SYSTEM_ALERT_WINDOW
Granted at install (7)
Low-risk permissions Android grants automatically, plus any we have not classified.
- FOREGROUND_SERVICE
- FOREGROUND_SERVICE_SPECIAL_USE
- RECEIVE_BOOT_COMPLETED
- USE_EXACT_ALARM
- USE_FULL_SCREEN_INTENT
- VIBRATE
- WAKE_LOCK
Defined by other apps (2)
Permissions that belong to another app or to this app itself.
- com.android.alarm.permission.SET_ALARM
- org.fossify.android.permission.WRITE_GLOBAL_SETTINGS
More Information
- Package name
- org.fossify.clock
- Version
- 1.6.0 (build 10)
- File size
- 9.1 MB (9,110,265 bytes)
- Requires
- Android 8.0 or later
- Category
- Productivity
- License
- GPL-3.0-only
- Developer
- Fossify
- Source code
- github.com/FossifyOrg/Clock
- Released
- Jan 31, 2026
- Signer SHA-256
- affdb124d3f4720c2f98dbca9eacba0514fba4306e20a2786c861c3c0d6ff292
- File SHA-256
- 43cf9f0ec45f1f1ff2df47286622e5b8f3acedaeb07b7f7641b5243dbedca079
- Checked
- , against the IzzyOnDroid index · how we check · verify it yourself
Common questions
Is this APK the official Fossify Clock release?
Yes. It is the developer’s own release of Fossify Clock 1.6.0, byte for byte as IzzyOnDroid distributes it. Its SHA-256 matches IzzyOnDroid’s signed index, and it is signed with the certificate IzzyOnDroid records for the app (SHA-256 affdb124d3f4720c2f98dbca9eacba0514fba4306e20a2786c861c3c0d6ff292).
What Android version does Fossify Clock need?
Android 8.0 or later (API level 26). Version 1.6.0 is built for Android 16 (target API 36). Runs on 64-bit and older 32-bit ARM phones.
Can Fossify Clock access the internet?
No. The APK doesn’t request Android’s internet permission, so the app can’t go online by itself. In total it declares 12 permissions, and 1 of them needs your approval first.
Does Fossify Clock contain trackers?
No known trackers: our scan of version 1.6.0 found no code matching the Exodus Privacy tracker signatures. The scan covers known tracker libraries; it doesn’t show what data the app itself sends.
Is Fossify Clock open source?
Yes. Fossify Clock is released under the GPL-3.0-only licence, and its source code is published at https://github.com/FossifyOrg/Clock.
Can I install this over Fossify Clock from Google Play?
Yes, as long as the version you install is the same as the Play version or newer. Fossify signs its Google Play and F-Droid releases with the same key and keeps the same package name, so Android treats this file as an update and keeps your data.
Recent releases
| Version | Released | Size | Requires |
|---|---|---|---|
| v1.6.0 · this download | Jan 31, 2026 | 9.1 MB | Android 8.0+ |
| v1.5.0 | Dec 16, 2025 | 9.1 MB | Android 8.0+ |
| v1.4.0 | Oct 30, 2025 | 9.0 MB | Android 8.0+ |
Versions currently kept in the IzzyOnDroid repository. We host and check only the newest one. Full changelog.
Alternatives and related apps
-
Fossify Calendar For reminders tied to a date: the Fossify calendar, whose reminders can repeat until you dismiss them.Download
