Essential

I consider this an essential app for all of my iOS devices.

It gets used for writing charts, writing new songs, and even doing quick MIDI exports for demos I load into other iOS apps.

I especially like being able to use the Nashville Number system allowing me to play the charts in any key without transposing. However, its extremely easy to change the keys of lettered charts also.

Wish list:

Macros

Shortcuts for inputting data

Listen to audio and convert to chords automatically.

Larry Seyer about iReal Pro, v7.0