Meet Cardiglow: a smart wearable device that monitors your heart rate and translates the data into color using LEDs. The device lets you know how hard you are pushing your body. It has a vibration motor to keep your workout sessions on track. Cardiglow is compatible with smartphones and smartwatches.
The device lasts up to 6 hours on a full charge. You can adjust the LEDs’ brightness to save energy. It also keeps you visible at night. More information is available on Kickstarter.