v2.1.1 The APK no longer carries Google's encrypted dependency-metadata block. Android's build tools embed that blob into every signed APK by default: the app's dependency list, encrypted with a Google public key and readable only by Google. This app is not distributed through Google Play, so it was never anything but dead weight, and F-Droid refuses an APK that carries one. Removing it is what lets the official F-Droid build ship this exact signed APK instead of a differently signed rebuild. F-Droid builds the app from source on its own infrastructure, compares the result against this release byte for byte, and distributes this file when the two match. The GitLab release, the project's own F-Droid repository and the official F-Droid repository are therefore one signing key, and moving between them is an ordinary upgrade rather than an uninstall that would take your calendar with it. No functional changes.