CrewNerd!

CrewNerd turns your cell phone into an on-the-water training tool in any rowing shell, canoe, kayak or dragon boat - with no wiring With a waterproof case, you can get real-time data during your workout and even relay it to your coach. Using the accelerometer in your device, CrewNerd is able to accurately calculate your stroke rate as well as how much bounce (vertical movement) and stern check you are producing. See our web site for more information.