If your power meter is Ant+ only, the RFLKT+ (iPhone only) is only $99.00 and will work with most of the popular iPhone cycling apps like Cyclemeter, Strava, Map My Ride, Ride With GPS and a few others, including their Wahoo Fitness app. The RFLK+ does an excellent job of converting Ant+ to Bluetooth. I used it for almost a year until I started having issues with the used Ant+ sensors I had and replaced them with Bluetooth sensors.