Quarantine suggestion - “Simply Piano” app

Bought a cheap beginner keyboard on Craigslist for $100 and started using this app on iPad to try to learn piano... it listens to your playing to monitor/correct you. Also teaches you sight reading sheet music as you go (which I have never spent much time trying to learn until now). Have played guitar since I was young so I’m already at least somewhat familiar with some of the basics (chord tones, scales, etc.), but it’s been surprisingly manageable to pick up. Wanted to pass along in case it could be useful to anyone.