Because Keezy’s UI is so simple, it is great for students with special needs who may find other apps confusing. A teacher can even color-code sheet music for their students to match the colors on the Keezy screen, allowing for the student to play by color as a support or substitution for conventional notation reading.
https://apps.apple.com/us/app/keezy-classic/id605855595
Keezy Classic is a sound-trigger app which allows for the recording of any sound into a color palette of 8 colored blocks. When a block is pressed, the corresponding sound plays. A major benefit of Keezy Classic is its flexibility, since the teacher can pre-record any instrument, word, or sound that might be needed.