Formulus

Open Data Ensemble

Tools

Formulus is an open-source (MIT) Android app by Open Data Ensemble. The APK we host is 36 MB, it needs Android 7.0 or newer, and it declares 20 permissions.

The file on this page is Formulus 1.4.0, 35.99 MB, and it installs on Android 7.0 and newer.

We compared the signing certificate of this build with the certificate recorded the first time org.opendataensemble.formulus 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 20 permissions, including access to the camera, precise location, approximate location and the microphone. Android asks you to approve those the first time the app needs them.

Its licence is MIT. 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.

Download APK · 35.99 MB

Version: 1.4.0
Size: 35.99 MB
Requires Android: API 24
Package: org.opendataensemble.formulus
Signature checked on: Oct 20, 2026
Where this file came from: F-Droid
Licence: MIT
Source code: Source for this version

File SHA-256: 7884a7256f5a2e4ff0e567897814742cdd9984d2effbda5f6b86baa33d0e6562

Signing certificate (SHA-256): 7765daaf9659e3e95f63a3fdf7ff79d3684140586853e2f0d16c59a353f4a3aa

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.