Great app!

I would give this app 5 stars if it had the option to repeat specific parts of the scales. However, this is a very useful app overall because it allows you to pick your range (soprano, alto, tenor, etc), the speed at which the exercises are played, and has a pretty large selection of scales to choose from. I like that you can see what notes youre singing, too, because the letters appear on the screen.

Ive been using it for a few weeks to prepare for a performance and already Ive heard an improvement in my vocal strength and sound quality.

Charles & Elise about Singing Vocal Warm Ups - Singer's Friend, v1.3