Geological Time Scale is an open-source (GPL-3.0-or-later) Android app by tengel. The APK we host is 90 KB, it needs Android 6.0 or newer, and it declares no permissions at all.
The file on this page is Geological Time Scale 0.7.1, 89.73 KB, and it installs on Android 6.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time org.tengel.timescale 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 declares no permissions at all.
Its licence is GPL-3.0-or-later. 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
- 0.7.1
- Size
- 89.73 KB
- Requires Android
- API 23
- Package
- org.tengel.timescale
- Signature checked on
- Sep 17, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-or-later
- Source code
- Source for this version
File SHA-256: 62db29f07db67aaed926cead82cf2db28035f55ce2e6e5998320d4ffa52d164e
Signing certificate (SHA-256): 27a703e04fa8dcb1b430eb6e9e687c3f9e9cda445ad2532e12ece4323fef38b8
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.
Screenshots
