Featherline: HRT Tracker is an open-source (GPL-3.0-only) Android app by mkx173. The APK we host is 9.0 MB, it needs Android 8.0 or newer, and it declares 9 permissions.
The file on this page is Featherline: HRT Tracker 1.4.2, 8.96 MB, and it installs on Android 8.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time com.mkx.hrttracker 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 9 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.
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
- 1.4.2
- Size
- 8.96 MB
- Requires Android
- API 26
- Package
- com.mkx.hrttracker
- Signature checked on
- Oct 16, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: 3fe60a336b62dcce5667f6154d9bcee1109da4e376b31d1dc3c60820b9dcb484
Signing certificate (SHA-256): eafb623ca55f65894f5f8a580de2e5b21bf0fe9477f9f872012d73dc5ad51e89
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
- POST_NOTIFICATIONS
- RECEIVE_BOOT_COMPLETED
- SCHEDULE_EXACT_ALARM
- USE_BIOMETRIC
- USE_FINGERPRINT
- WAKE_LOCK
- ACCESS_NETWORK_STATE
- FOREGROUND_SERVICE
- com.mkx.hrttracker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
