Hi, @egoitzr
Got it. In general:
- Classic was last updated in 2018, which means that it was catered for older versions of Android OS (4.4 and up) until stable release of 1.14.0 if I am not mistaken.
- Stable release is meant for general usage. Tested for stability and features that does not break the app.
- Beta introduces new features and unstable. It is offered as a release candidate before the features gets cut to official release.
Starting Mattermost 1.15.0, the changelog highlights a clearer message on the supported environment:
Server Versions Supported: Server v4.10+ is required, Self-Signed SSL Certificates are not supported unless the user installs the CA certificate on their device
…
Android operating system 7+ is required by Google.
In my opinion, it is best to run on the stable version of Mattermost app and server at all times.