One Superfit-branded pad is confirmed with Treadmill Pro: the Costway Superfit. Two others failed, and two have never been tested. The list on this page shows each one, so you can check yours before you spend an evening on pairing.
Superfit, Costway, Gymax: how the names fit together
Superfit is a product line sold by Costway. The pads and folding treadmills come with a remote and, on many models, Costway’s Gymax app, which the App Store lists as a “Sports Health APP by Costway” for treadmills, ellipticals, bikes and smart scales (apps.apple.com/us/app/gymax/id1526270839, 19.10.2026). The listing names no treadmill models.
Retailers pair the line with the Gymax app and a remote, but speeds differ by model: 0.6 to 3.8 mph on a 3-in-1 under-desk pad, 0.6 to 7.5 mph on the 2.25 HP folding version (Walmart Canada listings seen 19.10.2026, retailer pages, not Costway’s own).
In Treadmill Pro, Superfit and Costway pads that use the Gymax protocol are handled by one driver.
Status of each model
The list on this page comes from the Treadmill Pro compatibility database (read 19.10.2026).
“Does not work” means a user tried it and marked it as failing. Two near-identical Costway units can still behave differently, so a failed mark on SP37513SL says nothing about SP37914US.
Statuses are user-reported marks, not lab tests. Results on your model may differ. If it works or fails for you, mark the result in the app.
What to do if yours is on the failed list
- Keep using the original remote and the Gymax app. They were made for your unit.
- Tell us in the app that it failed. That tells the next owner not to waste the time.
- If you need a new remote, match it by model number. Third-party sellers list replacements for specific Superfit and Costway codes, and they are not interchangeable.
What you get when it works
Treadmill Pro finds the treadmill over Bluetooth and gives you speed control from the phone. It is free on iPhone, iPad and Android. It will not start an unpaired machine, and it will not exceed the speed the treadmill supports.
Choosing between pads? The portable treadmill guide and the small treadmill guide are good starting points. Every checked machine is on the devices page.
Sources
- Gymax, App Store page, https://apps.apple.com/us/app/gymax/id1526270839 (19.10.2026)
- Walmart Canada SuperFit listings, e.g. https://www.walmart.ca/en/ip/SuperFit-2-25HP-2-in-1-Folding-Treadmill-W-APP-Control-Speaker-Remote-Control-Blue/1HI291B7GRAG (seen in search results 19.10.2026; retailer, not official)
- Costway.com returned no readable product page on 19.10.2026, so no Costway manual is cited.
- Treadmill Pro app protocol code and compatibility database (19.10.2026)