These are vetted and fun games for when you need a different look at your music studies, or are stuck in the car or on vacation without a piano.
Pictune – This is the coolest computer game for visualizing the various dimensions of reading music, and it’s free. Available only through the internet (not as an app). Takes some patience to walk through the instructions and figure out. But do it, it’s worth it!
Music Tutor – free, IOS and Android. What’s not to love about free, and it covers both bass and treble, and under options you can choose the range you want to play. Pedagogically sound, but not as fun as . . .
NoteWorks – free, IOS and Android. Now this is a seriously fun sight reading game. Unfortunately it’s only offered in the US as a free sample, which is limited to treble clef.
Piano Notes Fun – Sight Reading Tutor – $2, iOS only.
Piano Tutor – $3, iOS only, a little advanced from the others.