Personally I use insync to sync my notes to the cloud, and then sync them to my devices with similar apps for android. Then it's just finding apps for editing

Personally I use insync to sync my notes to the cloud, and then sync them to my devices with similar apps for android. Then it's just finding apps for editing the notes; everything from neovim on termux to just using Obsidian as a frontend is viable. But mobile is kind of a bad platform for plain text editing imho.