Available in iTunes for free (as well as Google Play for Android), Triggertrap connects to the OM-D via a dongle designed for the camera that can be purchased online for about $30. Once you've made the connection, you can control the OM-D with the iPhone.
There are more than 15 different modes for the app, everything from a standard remote release to sound trigger and more. I've used Triggertrap with good success for the Live Time mode on the OM-D. It's a terrific app, and the dongle takes up very little room in your bag.
iPad for Digital Photographers
If you love mobile photography like I do, then you'll enjoy iPad for Digital Photographers-- now available in print, Kindle, and iBooks versions.
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