The WalkingPad C2 works with Treadmill Pro, according to users who marked it as working. The A1 Pro does not. Below is every WalkingPad and Kingsmith model we have a result for, with the gaps spelled out.
The C2 in short
The C2 is the model most people search for, so it comes first.
- Treadmill Pro talks to it over standard Bluetooth fitness protocol (FTMS). Status: works, model page.
- Retailers list its speed as 0.5 to 6 km/h in 0.1 steps, set by the app or the remote (jbhifi.com.au and ypc.co.uk, 19.10.2026). WalkingPad’s own US page for a C2 lists “1 - 4 MPH” and the free KS Fit app (walkingpad.com, 19.10.2026). The two sources agree on a low walking range but not on the exact numbers, so check the label on your unit.
- KS Fit is WalkingPad’s own app. Treadmill Pro is a separate free app for iPhone, iPad and Android, and does not need KS Fit to connect.
The app will not start a treadmill that is not paired, and it will not push the belt beyond the speed your treadmill supports.
Every WalkingPad and Kingsmith model we have data on
The list on this page comes from the Treadmill Pro compatibility database (read 19.10.2026). The Kingsmith X21 is marked by users as working; we make no promise beyond that mark.
The A1 Pro failed. WalkingPad’s page lists it with KS Fit and a remote, speed 0.5 to 3.75 mph (walkingpad.com, 19.10.2026). If you own one, keep using KS Fit.
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.
Trying it on an untested model
- Close KS Fit so two apps do not compete for the connection.
- Open Treadmill Pro and scan.
- Start at the lowest speed and step up.
- Mark the result.
New to walking while you work? The walking treadmill guide and the best treadmill for walking roundup cover how to choose. All checked machines are on the devices page.
Sources
- WalkingPad C2 page, https://www.walkingpad.com/products/walkingpad-c2-foldable-walking-machine (19.10.2026)
- WalkingPad A1 Pro page, https://www.walkingpad.com/products/walkingpad-a1-pro-foldable-treadmill (19.10.2026)
- JB Hi-Fi, https://jbhifi.com.au/products/walkingpad-c2-compact-folding-treadmill-black (19.10.2026; retailer)
- YPC, https://www.ypc.co.uk/product/walkingpad-c2s1-treadmill-0-5-6-km-h-walking-treadmills-for-home-foldable-app-compatible-with-remote-control/ (19.10.2026; retailer)
- Treadmill Pro compatibility database and protocol code (19.10.2026)