BoxBack is the app for punchbags. BoxBack turns your punchbag into a personal trainer. BoxBack can measure how hard you are hitting your punchbag as well as being able to track your workout and measure the number of calories you are burning.
BoxBack works best with the BoxBack strap, an accessory that attaches your phone to the punchbag so that your phone can recognize impacts.
For more information please see our website http://www.boxback.net/
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