Quick Answer: Apple Watch has no native support for running sensors or treadmills. Apple's built-in sensor list covers heart rate monitors and cycling sensors only—so unlike the Bike, your Tread's speed and incline can't be paired in watch settings. FitSwitch broadcasts your Tread over the standard Running Speed & Cadence (RSC) and FTMS treadmill profiles, and a third-party watchOS app that speaks one of those will pull in real speed, distance, pace, and incline. Without one, your watch still records a perfectly good indoor run from its own motion sensors and heart rate.
Table of Contents
- Why the Tread Is Different From the Bike
- What Apple Watch Actually Supports
- What FitSwitch Broadcasts From Your Tread
- Option 1: No Extra App
- Option 2: A Third-Party App That Reads the Broadcast
- Apps That Connect Running Sensors on Apple Watch
- Setting It Up
- Heart Rate
- FAQ
Why the Tread Is Different From the Bike
If you've read our guide to using Apple Watch with the Peloton Bike, the setup there is genuinely easy: pair FitSwitch once in Settings → Bluetooth → Health Devices, start an Indoor Cycle workout, and the watch records watts and cadence natively.
None of that carries over to running.
When Apple added Bluetooth sensor support in watchOS 10, the feature was entirely cycling-focused—power meters, cadence sensors, speed sensors. Running sensors weren't included then and still aren't. There is no footpod section in watch settings, and there never has been.
So on the Tread, the question isn't "how do I pair it." It's "which app is willing to listen."
What Apple Watch Actually Supports
Under Settings → Bluetooth → Health Devices, Apple Watch will connect to:
- Heart rate monitors (Bluetooth)
- Cycling power meters
- Cycling cadence sensors
- Cycling speed sensors
That's the whole list. Two things people expect to find there are missing:
- Running footpods (RSC) — the Bluetooth profile treadmills and stride sensors use for speed and cadence
- FTMS — the fitness-machine protocol treadmills, rowers, and smart trainers use
Neither is supported by watchOS at the system level, no matter which watch you own.
But Apps Can Do It
Third-party apps on Apple Watch can open their own Bluetooth connections. An app that implements RSC or FTMS itself can connect to sensors watchOS won't touch on its own—which is exactly how footpods like Stryd have worked on Apple Watch for years.
That's the workaround, and it's a real one.
What FitSwitch Broadcasts From Your Tread
FitSwitch reads your Tread's live data straight from the hardware and rebroadcasts it on standard protocols—it detects that it's on a Tread and switches automatically from bike metrics to running metrics:
- BLE Running Speed & Cadence (RSC) — speed, distance, cadence
- BLE FTMS (treadmill) — speed, incline, distance, plus equipment control
- ANT+ — for Garmin watches and head units
- Heart rate — rebroadcast from your strap
Nothing here is FitSwitch-specific or proprietary. Any app that supports footpods or FTMS treadmills sees your Tread as a normal, standards-compliant sensor.
Garmin users get the easy path here, by the way: Garmin watches support footpods and RSC natively, so a Tread run pairs the same way a footpod does and flows into Garmin Connect with full pace and distance.
Option 1: No Extra App
Worth saying plainly, because it's what a lot of Tread runners should do: the stock Workout app already handles indoor runs well.
Start an Indoor Run on your Apple Watch and it tracks:
- Distance and pace, from the watch's accelerometer
- Heart rate
- Duration, cadence, and active energy
- Full rings credit and Apple Health sync
Apple Watch calibrates its indoor-run distance over time against your outdoor GPS runs, and for most runners it lands close. What you don't get is incline, or distance that matches the Tread's display exactly.
If you mainly want your run recorded, your rings closed, and your training log complete, this is enough—and it needs nothing but the watch you already own.
Where it falls short is steep incline work, where the watch has no idea you're climbing, and any session where you need your watch and the Tread to agree on the numbers.
Option 2: A Third-Party App That Reads the Broadcast
Install a watchOS app that connects footpods or FTMS treadmills, pair it to the FitSwitch broadcast, and your watch records the Tread's own measurements instead of estimating from wrist motion:
- Speed and pace straight from the belt
- Distance matching the Tread exactly
- Incline and elevation gain
- Cadence
This matters most for interval and incline sessions, and for anyone whose training log needs to match what the Tread displayed.
Apps That Connect Running Sensors on Apple Watch
These watchOS apps support external running sensors. Two different families, depending on which broadcast they speak:
Footpod / RSC Apps
WorkOutDoors — Connects Bluetooth sensors for pace, distance, cadence, power, and heart rate directly on the watch, including footpods. Deep custom data screens and offline maps. Note its documented limit of two Bluetooth sensors at once, which is a watchOS restriction on third-party apps rather than an app limitation.
iSmoothRun — Long-standing support for Bluetooth footpods, including Stryd and running-power sensors, with a full Apple Watch app, structured workouts, and audio cues. Exports to most training platforms.
FTMS Treadmill Apps
Virtual Treadmill — Built specifically for treadmill running. With a Bluetooth FTMS treadmill, speed, distance, incline, and elevation sync automatically, and it has an Apple Watch app with live mirroring.
Thrivify Connect (FTMS Pair) — Links Bluetooth FTMS gym equipment to Apple Watch and iPhone, logs sessions from the wrist, and syncs to Apple Health. Supports treadmills alongside rowers, bikes, and other cardio equipment.
Before You Buy
App capabilities change, and support for a given sensor profile isn't always spelled out in an App Store listing. A few things to check:
- Does the app connect the sensor on the watch, or on the iPhone with the watch mirroring? Both work, but only the first lets you leave your phone behind.
- Does it support generic RSC footpods, or only one specific brand of pod?
- For FTMS apps, does it read incline or only speed?
Our compatible apps list tracks what's currently confirmed working with FitSwitch, and support can tell you what other Tread owners are running.
Setting It Up
Step 1: Install FitSwitch on Your Tread
Follow the installation instructions. Once installed, the metrics overlay and broadcasting work automatically—FitSwitch recognizes the Tread and switches to running metrics on its own.
Step 2: Start the Belt
Get the Tread moving before you try to pair. Sensors only advertise when there's data to send, and a stationary belt gives the app nothing to find.
Step 3: Pair Inside the App
Open your chosen app on the Apple Watch and go to its own sensor or device settings—not watch Settings, which won't list running sensors at all. Look for the FitSwitch broadcast under footpod, running sensor, or treadmill depending on the app, and connect.
Step 4: Start an Indoor Run
Start the run from within that app so it's the one recording. Speed, pace, distance, and incline come from the Tread; your heart rate comes from your strap or the watch.
Step 5: Check It Saved to Health
Most of these apps write to Apple Health, so the run lands in Fitness and counts toward your rings like any other workout. Confirm on your first session.
Heart Rate
Heart rate is the one part of this that's straightforward, because Apple Watch has always supported Bluetooth HR straps.
- Wrist HR works fine for running—far better than for cycling, since you're not gripping handlebars.
- A Bluetooth strap pairs natively under Settings → Bluetooth → Health Devices, and the watch uses it automatically once connected.
- FitSwitch's HR rebroadcast is there if your strap is ANT+ only, or if you want the same reading on the Tread overlay and your wrist.
Any ANT+ or Bluetooth strap works with FitSwitch.
Can My Watch Control the Tread?
FitSwitch broadcasts your Tread as an FTMS treadmill, which includes equipment control—an app can set target speed and incline, not just read them. That's how a structured interval session can drive the belt instead of you reaching for the screen mid-effort.
In practice this depends entirely on the app supporting treadmill control, and it's far more common in training apps on a phone or the Tread screen than in watch apps. Treat wrist-based control as a bonus if your app offers it, not something to count on.
Frequently Asked Questions
Does Apple Watch support RSC or footpods?
No. watchOS supports Bluetooth heart rate monitors and cycling sensors (power, speed, cadence). Running speed and cadence sensors aren't in the system-level list, so you need a third-party app that implements RSC itself.
Does Apple Watch support FTMS?
No. There's no native FTMS support on Apple Watch for treadmills or any other equipment. Apps like Virtual Treadmill and Thrivify Connect implement it themselves.
So can I use my Tread with Apple Watch or not?
Yes—just not through watch settings. Either let the watch track the run on its own (works out of the box, no incline), or use an app that connects to the FitSwitch broadcast for exact Tread speed, distance, and incline.
Why does the Bike work natively but not the Tread?
Because Apple built Bluetooth sensor support around cycling. The Bike broadcasts as a cycling power meter, which watchOS supports directly. The Tread broadcasts as a running sensor, which it doesn't.
Will my rings still close?
Yes, in both setups. The run records as a normal workout and writes to Apple Health either way.
Is Garmin easier for Tread runs?
For this specific job, yes. Garmin supports footpods and RSC natively, so a Garmin watch pairs the FitSwitch broadcast with no third-party app. Garmin also picks up the ANT+ broadcast, which Apple Watch can't receive at all.
Do I need my iPhone nearby?
Depends on the app. Some connect Bluetooth on the watch itself and run standalone; others connect on the iPhone and mirror to the watch. Check before you rely on leaving your phone behind.
Will the distance match the Tread's screen?
With an app reading the broadcast, yes—it's the Tread's own measurement. Without one, the watch estimates from wrist motion, and it'll be close but not identical.
Can I record on Apple Watch and use a training app at the same time?
Yes. FitSwitch broadcasts on several protocols simultaneously, so a watch app, a training app, and the on-screen overlay can all run at once.
Does the metrics overlay work regardless?
Yes. The overlay shows speed, incline, pace, and heart rate on top of whatever's on the Tread screen, independent of anything on your wrist.
Getting Your Tread Runs Onto Your Wrist
Apple's sensor support hasn't caught up with running yet, and pretending otherwise just wastes your time in a settings menu that will never list your treadmill. The honest version:
- Apple Watch alone — solid indoor run, no incline, nothing to set up
- Apple Watch + a sensor-capable app — real Tread speed, distance, pace, and incline
- Heart rate — natively supported either way
- Garmin — natively supported, no app needed
FitSwitch broadcasts on the standards, so whichever route you take, your Tread is finally speaking a language other devices understand.
Get FitSwitch — open up your Peloton Tread.
Last updated: July 2026