Phlex ios7 Fitness App

I'm not a designer, but love designing the more I do it. This is the UI of an app I created called Phlex. It's the first iPhone app that tracks and counts reps automatically during a workout, for movements such as pushups, situps, squats and jumping jacks - all using information leveraged from the device's gyroscope and accelerometer.

I know I have a long way to go, but wanted to upload parts of the app design and get some feedback from more experienced designers!

PS - If anyone wants to collaborate on this project let me know!