Meet the Zwim: smart swimming goggles with a heads-up display that shows your time, heart rate, laps, and other data, so you can keep a close eye on your performance during your swims. Zwim has an optical heart-rate sensor to monitor your performance. It also comes with a flexible arm and straps.
After your session, you can use the app to sync the data to your phone. Zwim will be compatible with iOS and Android devices. Its battery lasts up to 4 hours. This is like Google Glass for swimmers. You can find it here.