This piano app listens and corrects you--and gives you 5 years to master it

When you purchase through links in our articles, we may earn a small commission. A 5-year flowkey Classic Plan is $99.99 (MSRP $899). Trying to teach yourself piano usually breaks down at the same point: you can follow along with sheet music or a video, but you can't verify if you're doing it right. And, honestly, who wants to take formal lessons every week? Instead, there's an app for that: flowkey, and it turns your keyboard or piano into something closer to an interactive lesson setup.