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TL;DR: Get five years of flowkey Classic for $59.97 (reg. $899), including interactive piano lessons, real-time note feedback, and more than 1,000 classical and public-domain songs.

A piano teacher can tell you when you've hit the wrong note, but scheduling regular lessons isn't always convenient. flowkey offers some of that immediate feedback through an interactive app that listens as you play. It also includes guided courses, synchronized sheet music, and practice tools that help you work through songs at your own pace. Right now, you can score a 5-year subscription to its Classic Plan on sale for $59.97 (reg.…