IRealPro (formerly iRealB) is handy as a reference. On my iPhone, it's too small to read chords on a gig. On the iPad, you could.

Chord Bot runs on the iPhone also. It's very handy for a composer to play with ideas for new chord progressions. If I recall correctly, the pro version gives many more rhythm and background choices.

There are several (at least 20 I've seen) apps that read PDF charts. I use an Airturn Digit with my iPad. Works great.


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