I would’ve said Infinity for… something, but we know how that turned out. So, I’d say it ir most likely Fennec F-Droid, it is the first app I install in every device that isn’t a tablet

BitWarden.

One of the best, if not the best password manager I’ve ever used.

Recently it’s been Obtanium, basically it allows you to add apps which are hosted on GitHub/other app sources which don’t have auto updating, and have them automatically check and offer to update!

It’s been really useful for Lemmy clients (liftoff/Jerboa)/any android apps from:

GitHub

GitLab

Codeberg

F-Droid

IzzyOnDroid

Mullvad

Signal

SourceForge

SourceHut

APKMirror (Track-Only) APKPure

Third Party F-Droid Repos

Jenkins Jobs

Steam

Telegram App

VLC

Neutron Code

“HTML” (Fallback)

Adaway is my favourite open source app because it blocks most ads system wide.

is Tachiyomi open source? if it is, then that. It’s always one of the first things I install on my device.

There’s just no better manga/comic reader app on Android (even on PC tbh).

The only thing better than Tachiyomi is one of its forks like TachiyomiSY which I’m currently using.