CalEF (Calendar Entry Formatter) is an open-source (GPL-3.0-or-later) Android app by k3b. The APK we host is 621 KB, it needs Android 4.0 or newer, and it declares no permissions at all.
The file on this page is CalEF (Calendar Entry Formatter) 1.1.2.1, 621 KB, and it installs on Android 4.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time de.k3b.android.calef 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 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.
The most recent release upstream is from Dec 4, 2023, over 2 years ago. It still installs; it is simply not being updated.
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
- 1.1.2.1
- Size
- 621 KB
- Requires Android
- API 14
- Package
- de.k3b.android.calef
- Signature checked on
- Sep 21, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-or-later
- Source code
- Source for this version
File SHA-256: d6169201ad16d3025494d66ffe69e384b4df0794dd7b33b263bec45774f62577
Signing certificate (SHA-256): 0d2865d3554614783fc8cea0e793999fa9c83fce4ff0d30d13bb61daaed16013
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
