Your heart rate
drives your trainer.
Zone Pedal watches your heart rate and adjusts your smart trainer's resistance in real time — so the workout stays in zone even when your body drifts.
Pair devices. Pick a workout. Pedal.
Pair devices
Connect your Bluetooth heart rate monitor and smart trainer. Chest strap recommended for the fastest control response. Zone Pedal talks directly to both devices on your phone.
Pick a workout
Choose from 13 workouts across four categories. Every workout is built to be driven by your heart rate — from calibration and threshold testing to endurance and high intensity.
Pedal
The math runs on your phone, estimates the right power, and trims resistance in real time to keep the session where it belongs.
Your workouts, your data, your phone.
Post-ride insights
Your cardiac profile
Set up in seconds
Your workout stays in zone. Even when you don't.
Fixed-Power Workout
Cardiac drift and fatigue push the session away from the intended zone.
Zone Pedal
The control loop trims resistance to keep heart rate in range as the ride changes.
The math runs on your phone: it estimates the right starting resistance, then adjusts continuously as your heart rate responds.
Built to account for the natural rise in heart rate that happens as a ride progresses — even when effort stays constant.
Your Body, clearly.
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Builds your baseline
After 3 interval workouts, the Your Body tab starts showing your cardiac fitness trend with honest change from your own baseline.
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Estimates your aerobic threshold
The Threshold Finder workout estimates where your aerobic threshold sits — the heart rate above which you're working harder than you can sustain for long efforts — without a lab test. It does this using DFA alpha1, a method based on the subtle patterns in your beat-to-beat heart rate data. Track how it shifts as your fitness improves.
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Estimates your VO2max
As you complete qualifying interval workouts, Zone Pedal builds a picture of how your heart responds to effort and uses it to produce a confidence-labeled VO2max estimate — how fit you are relative to age- and sex-adjusted norms. The estimate shows you how reliable it is.
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Follow your ride from the Lock Screen
Live Activity shows your current zone, heart rate, and power on the Lock Screen and Dynamic Island without unlocking your phone.
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Turns history into insight
After each ride, you get clear post-ride insights including cardiac response, recovery quality, and interval target honesty. Interval workouts build your fitness trend over time.
13 Workouts, 4 Categories
Start Here
- Discover Your Cardiac Response — a guided 20-minute ride that reveals how your heart responds to effort, with real-time learning messages as the system measures you
- Threshold Finder — 35-minute stepped ramp that estimates your aerobic threshold from DFA alpha1 fractal analysis of your heart rate variability
Endurance
- Zone 2 Aerobic Base — 30 to 90 minutes of steady aerobic work with adaptive resistance trimming
- Tempo Ride — sustained Zone 3 effort, podcast-friendly
- Recovery Ride — easy spinning that stays safely below Zone 2
- Steady Zone — pick any zone (1–5) and duration, and the trainer holds you there
Threshold
- Sweet Spot — long effort right below your limit
- Threshold Intervals — sustained hard efforts at your limit with recovery between (2x20 or 3x15)
High Intensity
- Norwegian 4x4 — 4 x 4 min hard / 3 min easy
- Seiler 4x8 — 4 x 8 min hard / 5 min easy
- Tabata — 8 x 20s max effort / 10s rest
- Billat 30/30 — 3 sets of 10 x 30s on / 30s off
- Rønnestad 30/15 — 3 sets of 13 x 30s on / 15s off
Start with Discover Your Cardiac Response. One 20-minute session reveals how your heart responds to effort, and that knowledge makes your Zone 2 rides more precise.
Import Any Zwift Workout
Open any .zwo file and Zone Pedal maps it into HR-aware control modes. Steady sections can follow HR targets; short intervals remain power-led with HR ceilings and post-ride honesty. Preview the structure before you ride.
All data stays on your device.
Zone Pedal stores your profile and ride history locally on your phone. If you enable Apple Health, completed workout summaries are written there too.
No account. No analytics. No server.
One purchase. Full app.
One-Time Purchase
- All 13 workouts included
- HR-adaptive trainer control
- No subscription and no account
$29.99 iPhone app. No recurring billing, no cloud tier, no unlock flow.
Heart rate monitor plus smart trainer.
Bluetooth HR Monitor
Any Bluetooth heart rate monitor works. A chest strap is recommended for the fastest and cleanest control response.
Most Smart Trainers
Zone Pedal directly controls FTMS-compatible smart trainers over Bluetooth for real-time resistance changes during the ride.
Tacx Neo and Legacy Trainers
Some Tacx trainers use FE-C over BLE, and Cycling Power Service telemetry is supported when available for tighter ride feedback.