During an auction, our proxy bidding system will automatically increase your bid for you, starting at the lowest possible amount, and automatically increasing your bid in response to competitive bids up to the amount necessary to win, but never more than your maximum bid.
If you're specifically looking for a device tailored more towards fitness (like the hypothetical "s5gym"), consider looking into smartwatches or fitness bands designed by companies like Fitbit, Apple, or Garmin, which are more focused on fitness tracking and might better suit your specific needs.