Resistance bands are wonderful exercise tools to use anywhere to get a fun workout. The STRAFFR Band is not your average workout band though. The whole band is a sensor, so you can link it to your iPhone to train smarter. The STRAFFR Band provides you with live feedback and guidance through its app.
The STRAFFR band records your progress throughout each session. It combines with your phone to provide you with personalized workouts and an adaptive training plan. The app has over 50 exercises for you to get started.[where to find it]