A simple timer for speedsolving Rubik's cubes and other twisty puzzles.
About this app
I couldn't find a single cube timer app on Google Play that is:
a) not ridden with ads b) looks nice
So I tried to make one myself! My vision was to implement the features expected of such a timer while staying true to its original purpose, including:
- Allowing for 15 seconds of inspection time as per World Cube Association competition ruling - Generating random scrambles - Career statistics: recent/historical averages and ability to manage previous solves - A light/dark theme
Licensed under MIT, by Matt Zhang.
What's New in v1.1
Imported from the F-Droid repository index.
Version history
Oct 4, 2021 · 1.6 MB · Android API 15–29 · code 2
Imported from the F-Droid repository index.
SHA-256 7220acf551e8c729a0df8e1809209f2dff8eec0ec77cc88456f211b05a375cec
Jan 9, 2021 · 1.6 MB · Android API 15–29 · code 1
Imported from the F-Droid repository index.
SHA-256 4eb45a32603648b02630b5bd75555c538b2520c57c7c8f07204447c2c1e0c9cb
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.mzhang.cleantimer is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Clean Timer first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Clean Timer, and a listing is removed when the evidence for it stops holding up.
Get Clean Timer
Every source we list for com.mzhang.cleantimer is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
7220acf551e8c729a0df8e1809209f2dff8eec0ec77cc88456f211b05a375cec
Signing certificate
227d003dae40247663d42d34cd26a816380384d8dc7d8f6ada84053fa5398f49
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
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