Tabata-style workout timer with a sneaky little twist - a variable time base!
About this app
Tabata Xtreme is a configurable interval timer for Tabata-style high-intensity workouts. It supports custom prepare, work, rest, rounds, sets, and rest-between-sets durations, plus presets you can save and reload.
Its standout feature is "Time Warp": a multiplier that scales how fast the work interval's clock runs relative to real time, independent of rest periods. You can, for example, make a 60 second dead hang actually last 70 (or 50) seconds. Shorter times build confidence, longer ones build performance. Whether you actually tell your client about this feature is up to you!
Although testing has shown that even if a person is aware of the time-warping it still helps them improve!
This F-Droid build has no ads, no analytics, and no network permission.
Licensed under MIT, by Toby (FivesevenApps).
What's New in v1.6.1
Imported from the F-Droid repository index.
Version history
Jul 6, 2026 · 3.9 MB · Android API 26–36 · code 9
Imported from the F-Droid repository index.
SHA-256 3e6c73fd0acd0eeeb2394c2ad20b95266f6ff1529c7f87fd8a6819468274fa96
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
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.fiveseven.tabataxtreme 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
No earlier build is on record for Tabata Xtreme, so there is nothing to roll back to yet. When a second version is published, this section will explain how to move between them safely.
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 Tabata Xtreme, and a listing is removed when the evidence for it stops holding up.
Get Tabata Xtreme
Every source we list for com.fiveseven.tabataxtreme 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
3e6c73fd0acd0eeeb2394c2ad20b95266f6ff1529c7f87fd8a6819468274fa96
Signing certificate
8a49d4ab2710a3c8e35bea11bdd2a584840c917108c1749d6248ca0a6fe297f7
Permissions Required
What each permission lets Tabata Xtreme do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
No earlier build is on record — this is the first release we have listed.
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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