Use What’s My Note? to learn music when a pianist is unavailable:

What’s My Note? uses OCR technology to read published choral music – the kind used by high school choruses, church choirs, barbershops and musical theater. Photograph the sheet music, or import it from a PDF or image file. Touch a note in the image to hear it played.

What’s My Note? is for choral singers.   It does not do any of the following: play piano or instrumental parts, play more than one voice at a time, play scores from start to finish, interpret rhythms.