Display the geological time scale of the Earth's history.
About this app
The App shows the geological time scale of the history of the earth. The time scale shows the units Eonothem, Erathem, Period, Epoch and Stage. It shows the begin of every period and if it is a GSSP. The time scale can be scrolled up and down if it does not fit on the screen. The view can be changed to fit the height of the display. Additionally, there is a true to scale option which sets the height of all periods according to its duration. You can select a period by touching it. Then, only the selected period and the subsequent periods are shown.
With the plus button it is possible to add a column with the more detailed unit at the right. The minus button removes the rightmost column. By sliding left or right, the view can be moved towards the more detailed or more coarse units.
There is also a search function which highlights the desired period.
Licensed under GPL-3.0-or-later.
What's New in v0.7.1
Imported from the F-Droid repository index.
- - French translation.
Version history
Feb 23, 2025 · 0.1 MB · Android API 23–34 · code 14
Imported from the F-Droid repository index.
- - French translation.
SHA-256 62db29f07db67aaed926cead82cf2db28035f55ce2e6e5998320d4ffa52d164e
Jan 6, 2025 · 0.1 MB · Android API 23–34 · code 13
Imported from the F-Droid repository index.
- - Keep table headers visible when scrolling.
- - Keep period name visible when scrolling.
- - Fix broken help text.
- - Fix crash when last period is selected.
SHA-256 cb528c8213e798d21723b8e07a8c4f29f3440788d1b33ad6dbef9feb05645a98
Jan 11, 2024 · 0.1 MB · Android API 15–33 · code 12
Imported from the F-Droid repository index.
- - Update numerical ages and GSSPs.
SHA-256 cea81eef32ae04558d76ef04b70ed4b8311259da49897e1cb720af6ab8a93e19
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 org.tengel.timescale 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, 0.7.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Geological Time Scale 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 Geological Time Scale, and a listing is removed when the evidence for it stops holding up.
Get Geological Time Scale
Every source we list for org.tengel.timescale 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
62db29f07db67aaed926cead82cf2db28035f55ce2e6e5998320d4ffa52d164e
Signing certificate
27a703e04fa8dcb1b430eb6e9e687c3f9e9cda445ad2532e12ece4323fef38b8
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.
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