Termux is one of the best apps ever made for Android power users. It literally replaces so much stuff, if you don't care about GUI. No need for SSH app - it has ssh. No need for file sync app - there is rsync. No need for notetaking app, there is your $EDITOR you like. All 100% free. It's amazing.

+1. Termux absolutely rules and makes the dream of a cyberdeck actually viable. I use it at least once a week for various homelab stuff.