Please note that the most convenient way for Beta testing is to opt in as a Tester at Google Play: https://play.google.com/apps/testing/org.andstatus.app
Unfortunately F-Droid doesn't have a notion of Beta release/testing yet...

If you don't use Google Play, for Beta testing I'm attaching the latest Beta release of AndStatus to this post.
The apk file inside the zip is signed with the same keys as in Google Play. I.e. in order to test the application you may be prompted to uninstall existing AndStatus application, downloaded from other sources (e.g. from F-Droid).

AndStatus has Backup/Restore feature, so you can Backup app's data before uninstall and restore it after installation of a new version. In order to backup avatars and attachments please set "Storage -> Backup media files" checkbox.

Before installation of the below linked AndStatus package you have to unzip it first. This is .apk file that should be installed. I use "Total Commander" for unzipping.

The latest Beta / Release. Android 7.0+ only.

2024-12-12 v.62.02 Beta "Get "max_characters" from Mastodon configuration"
https://github.com/andstatus/andstatus/releases/download/62.02-beta/AndStatus-62.02-release.apk

See the Change log: http://andstatus.org/changelog.html

Unzipping Android package using Total Commander application

Archived release for older devices

2017-08-13 v.35.06 Release. Android 4.4+. AndStatus-35.06-release.zip