iReal book and subsequently, iReal b initially did not have a built-in player. I suspect the app was initially designed as an electronic (and transposing!) version Pocket Changes, a small format, spiral-bound, chords-only fake-booklet popular with bassists.
Still available:
http://www.jazzbooks.com/mm5/merchan...C#.UrNas_F5mK0
http://tromboneforum.org/index.php?P...8994#msg798994
The player feature was added later and (I believe) was intended for practice use.
I think the first mention of performance use of the player wasn't until April, 2010
http://www.irealb.com/forums/showthr...=3464#post3464
)BOB
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