I'm looking for fitness tracker recommendations. The wearer will be my 13 year old daughter, and our primary goal is to gamify the process of getting her fit for netball. Her go to means of exercise is currently running, so something that will work well with that would be best. I'm hoping to keep it under $150, and am not really interested in a smart watch for her.

I'm currently leaning towards the Fitbit Flex, but are there other devices I should be considering? Ideally it would be something with an iOS companion app. Working with the iPhone 4 would be nice, but not essential if there is an app for the latest iPad Mini.