There seems to be no shortage of iPhone cycle computer apps. Most of these utilize GPS to track speed, distance and even elevation. What they can’t generally track is the cadence of the pedal stroke.
But now Wahoo Fitness has introduced the Blue SC Speed and Cadence Sensor, which works with the iPhone 4S and new iPad. It can be paired with cycling apps such as Cyclemeter and Strava, or of course Wahoo’s own Fitness and Odometer app. The add on hardware attaches to a bike just like any other cadence sensor but in this case transmits directly to the handset via Bluetooth 4.0 technology. It is available now for about $60 for those looking to watch their spin a little more closely.
httpv://youtu.be/pALhY17bNdQ