Use APKPure App
Get B4X for Pleroma & Mastodon old version APK for Android
Client open source per Pleroma / Mastodon
Open source Mastodon / Pleroma client.
Simple interface with great performance.
Allows reading, searching and creating rich content on the fediverse.
Supports emoji reactions, rich media, push notifications, auto-bookmarks and more.
If you are new to the fediverse then start here: https://www.youtube.com/watch?v=IPSbNdBmWKE