Why is my progress not synchronised between two devices?
All your progress should be synchronised. However, the workouts will be different on different devices.
If your high scores and history are not synchronised at all between devices, you might have logged in with two different accounts. In that case, log out of Peak on the device that doesn't match your original account, and login again with the login method and details you used to register originally.
Unfortunately, Peak is not optimised to be played on multiple devices as this can confuse our servers when your progress is being collected. We recommend logging out on one device before logging back into the other and vice versa to minimize this problem. Both devices will also need to be connected to the internet for it to sync correctly. However, we cannot guarantee that there won't be any synchronization issues at all.