Principia is an open-source (BSD-3-Clause) Android game by Bithack. The APK we host is 29 MB, it needs Android 5.0 or newer, and it declares 2 permissions.
The file on this page is Principia 2026.08.16, 28.84 MB, and it installs on Android 5.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time com.bithack.principia 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 game does.
The manifest declares 2 permissions, none of which cover contacts, location, SMS, the camera or the microphone.
Its licence is BSD-3-Clause. We took this build from F-Droid, and the source for this exact version is linked below.
F-Droid, who build and sign this package, flag it: it relies on a network service that is not open source. We pass that on as they recorded it — we have not tested the game ourselves.
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
- 2026.08.16
- Size
- 28.84 MB
- Requires Android
- API 21
- Package
- com.bithack.principia
- Signature checked on
- Sep 17, 2026
- Where this file came from
- F-Droid
- Licence
- BSD-3-Clause
- Source code
- Source for this version
File SHA-256: 8b64f3d5f9ea86dcc7c5636481eae8d90439348be620eade6b5ed50a24e0cfa7
Signing certificate (SHA-256): 8bac81fa59cbaff8ab413dd7a28df51f90ea7f95a47557907687312ed1424f6c
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
- INTERNET
- VIBRATE
Screenshots
