

Shizuku and Canta hands down, debloating my phone greatly increased my battery life.
Librera is a pretty good ebook reader.
KISS Launcher is the best launcher bar none.
Of course KeePassDX is a great password manager.
ThumbKey is the best software keyboard I’ve ever used, nothing else even comes close.
Doing that becomes harder and harder as time goes by. When I was shopping for a new Android phone I couldn’t find one that was recent enough and also had custom rom support of any kind. I know there are smartphones specifically built to be friendly towards custom roms and Linux but those are only available in Europe and North America.