Keyloro

Keyloro teaches complete beginners to play a whole song on the piano, and to read the notes while they do it. Each song page splits the tune into short lines. The key to press lights up on an on-screen keyboard, the sheet music waits until you find it, and the help comes off one step at a time: first the lit key goes, then the letter under the note. By the end of a song you can read a few notes on the staff.

There are 20 songs so far, from Happy Birthday and Twinkle Twinkle Little Star to Jingle Bells and Silent Night, plus a free guide to the piano notes. No sign-up and no piano needed: it works on a phone, a tablet or a computer keyboard. Song pages are free; Keyloro Full is a one-time $39 purchase.