Made a fun app that generates daily riddles. If you give an llm an answer then ask it for a riddle, it's pretty clever and fun to see what connections it draws: https://riddles.jpn.fyi/

I'm also currently working on an app that lets me hum a tune into my phone and generate guitar tabs. The audio processing is proving to be temperamental at pitch detection, but I'm planning on looking at some autotune libraries to see how they clean up audio for processing. Main problem I have is that I'll come up with a tune in my head, but by the time I sit down with a guitar and find my first target note, I've forgotten most of what I'd hummed.