Loop is an Apple Watch and iPhone app that connects your Bluetooth treadmill or walking pad to Apple Fitness and Health, with the distance, speed and steps the treadmill measures.
4 days free · One-time purchase, no subscription
Loop speaks both Bluetooth treadmill standards: FTMS (Fitness Machine Service) and RSC (Running Speed and Cadence). If your treadmill works with Zwift or Kinomap, it will most likely work with Loop. It finds it, remembers it and reconnects when you open the app.
Supported Bluetooth standards
The same pages, colours and gestures as the Workout app: time, heart rate, calories, distance and splits. Change the treadmill speed with the Digital Crown, and if you start the belt from its remote, the workout starts on its own.
Each sensor contributes what it measures best: the treadmill provides distance, speed and steps, and Apple Watch provides heart rate and calories. Loop combines them into one workout that's saved to Health and shows up in Fitness, so your rings, trends and history match what you actually did.
Walking with your hands on the handrail, on a laptop or holding a coffee? On its own the watch would count too few steps and too little distance. Loop takes distance and steps from the treadmill, so the workout is right even if your wrist is still or resting on a desk.
When you finish, Loop looks at your speed and cadence and saves the workout as a walk or a run. If it gets it wrong, change it with one tap in the summary and it's corrected in Health too.
Price
No monthly or yearly fees. Try it free for 4 days with your treadmill and, if you like it, unlock it forever with a single payment.
Every feature from day one, without entering a card.
Pay once and it's yours, on your iPhone and Apple Watch. No automatic renewals.
No sign-up and no tracking. Your workouts stay in Apple Health.
Loop is tested with the Mobvoi Home Treadmill SE and should work with any FTMS or RSC Bluetooth treadmill. Treadmills with their own protocols (some WalkingPad or FitShow models) aren't supported yet. If yours won't connect or something isn't right, tell us the brand and model and we'll try to make it compatible.
On a treadmill Apple Watch can't use GPS, so it estimates distance from your wrist movement and stride, and it often drifts, especially if you hold the handrail or walk slowly. Loop fixes this by reading the distance measured by the treadmill itself over Bluetooth and saving it in the Apple Fitness and Health workout.
If you walk on a walking pad with your hands on the keyboard, Apple Watch barely detects any steps because your wrist doesn't move. With Loop the distance comes from the treadmill and, if the treadmill sends steps (like the Mobvoi Home Treadmill SE), Loop saves those steps to Health. No need to wear the watch on your ankle.
With Loop: turn on the treadmill, close the manufacturer's app on your phone (most treadmills accept only one connection at a time) and open Loop on Apple Watch. Loop finds the treadmill over Bluetooth, connects automatically and remembers it for next time.
Loop works with Bluetooth treadmills and walking pads that use the FTMS (Fitness Machine Service) or RSC standard. A simple hint: if your treadmill works with Zwift or Kinomap, it will almost certainly work with Loop. The Mobvoi Home Treadmill SE is certified and brands like UREVO, KALWOL and Schwinn have confirmed FTMS; the full list is on the compatible treadmills page.
Loop is not a subscription. It's a free download with a 4-day trial of every feature, and then you unlock it forever with a single payment: €2.99 at launch and €4.99 afterwards (local prices vary by country). No monthly fees, no ads and no accounts.
