I'm looking for an Android app that can save notes (plain text) and is able to attach multiple tags to the note. The tags should be managed as a tree.
Some people recommend to "fake" the hierarchy by adding a seperator like an underscore for each sub level e.g. "#level1_level2“. But if you change the structure of the tree e.g. by adding a new level you have to refactor all your tags.
Hope to hear some suggestions!