I'm a skeptic by nature, so I wasn't sure what to expect with the HeartMath InnerBalance sensor for iOS ($99). The device clips to your earlobe and detects your emotional signals, transmitting them to your iOS device. Well guess what... the darn thing works! I was surprised to see that as my breathing, pulse, and emotions changed, the app registered those changes. There is something to this, and physicians, therapists, and researchers need to take note!
The sensor is more comfortable than I thought it would be... I thought it would pinch, but it just sort of sits on your earlobe. A wire tethers the sensor to your iOS device with a 30-pin connector. If you have devices with Lightning connectors, you'll need an Apple adaptor. The connection is a bit tricky, and it took me a few tries to get everything plugged in just right. I would prefer a wireless solution, but it does work.