Minimum supported Android version: 5.0 (API 21)
This is the usual version of the app, available also on the main blog page. It differs from the experimental builds below in the fact it doesn’t ship FFmpeg embedded (it will be automatically downloaded the 1st time the app needs it - i.e. for media conversions, as when “downloading” MP3s). This version may not work properly (due FFmpeg failing media conversions) in later versions of android, starting from v29. For those devices, the experimental builds must be used.
Minimum supported Android version: 7.0 (API 24)
Those builds ships with a FFmpeg binary included, thus are bigger in size. This is needed, in some cases, for Android v29 and higher, in order to do media conversions (audio extraction, mp3 encoding, etc.). The only caveat is that you must know the type of CPU in your device. Incompatible builds will not work.
The most common CPU type is the arm64-v8a, second build down here.