Heres my tier list of open source android apps, I have only included ones i feel I have used enouph to understand.

Please tell me any of your favorite open source apps as I would love to hear.

S tier- OpenCalc, firefox, thunder, organic maps, Aegis authenticator, wikipedia, F-Droid, Clock.

A tier: open camera, fossify suite, k-9, termux, simplenote, Acode, pie launcher, translate you, lavendar photos, Heliboard,

B tier: gallery (by iacoblonut), peer tube, simple keyboard, floris board (might be higher if it used haptic feedback interface by default), unexpected keyboard (would be S tier if shift did not carry on selecting text once released).

C tier: FreeDcam, libre camera, geo notes, free paint.

Checkout my post of my favourite Floss android games here

Edit: after using the apps some more I have:

• moved “translate you” from S to A tier due to no offline translation

• added lavendar photos to A tier (my new gallary of choice)

• added Clock to S tier (a much better Foss clock then fossify clock)

• added Heliboard to A tier due to recomendations below (my new main keyboard)

And added a link to my post about my favourite floss android games.