Middle C: Piano Scales & Chords is a free iPhone app developed by Sameh Aly. This app is designed to make learning piano scales and chords easier than ever before. With Middle C, users can learn how to play piano scales and chords, as well as the formulas used to build them. The app allows users to select any scale or chord in any key and then listen to it being played on a keyboard.

In addition to playing the scale or chord, Middle C also displays all of the notes involved and the formula used to build it. This feature helps users understand the theory behind each scale and chord. Furthermore, the app provides correct fingering for each scale, making it easier for users to practice and play accurately.

Currently, the app includes major and minor scales in all keys, as well as major, minor, diminished, major 7th, and dominant 7th chords. The developer plans to continue updating the app and adding more scales and chords in the future. Overall, Middle C: Piano Scales & Chords is a helpful tool for piano enthusiasts of all levels who want to improve their understanding and playing of scales and chords.