All of these apps are available for Android devices. I haven’t been compensated for my reviews, I just want to share what apps are out there. See more categories under menu Android App Reviews.
This is a great app for students to practice seeing moving notes on the staff and finding them on the keyboard. At the top of the screen is a moving staff with different notes. In practice mode you must hit the correct note before the note will cross the line and let you go on to the next note. In normal mode the notes keep going whether you got them correct or not. There are lots of options to change what notes are seen, including adding sharps or flats, changing key signatures, changing how the keys are labeled, the range of notes you want it to use, and clef (includes treble, bass, alto and tenor clefs).