I usually use Cardiotrainer outside with the GPS and it works pretty well. But right now, I'm out of town and am running on a treadmill. The app is supposed to count ur steps, which it does while the screen is on. However, as soon as I lock the phone (to save battery of course), the app stops counting. It even says to use the power button to lock the screen. Is this an issue with my phone or with Cardiotrainer?
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