Warning: although this app is under active development, it does not yet work.
BlabberTabber is an iOS Application that performs speaker diarization. (i.e. "who spoke when?"). It does not perform speech recognition.
Charlotte Cunningham did much of the design work and graphics.
Vaquero, C., Vinyals, O., and Friedland, G., A Hybrid Approach to Online Speaker Diarization, INTERSPEECH, page 2638-2641. ISCA, (2010)
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Gonina E., Friedland G., Cook H., Keutzer K., Fast Speaker Diarization Using a High-Level Scripting Language, In Proc. of ASRU Workshop, 2011.
Di Matteo, D. Speech Diarization on a Mobile Platform, 2011
WenQi Huang, Yu Li, Hakim Akeb, ChuMin Li, Greedy Algorithms for Packing Unequal Circles into a Rectangular Container, Journal of the Operational Research Society, May 2005