Pick a workout.
Just ride.
Choose a steady ride or hard intervals and let your compatible smart trainer handle the resistance while you focus on the ride.
Pair devices. Pick a workout. Press go.
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 built-in workouts across 5 categories: Zone 2, recovery, tempo, threshold, Tabata, and more.
Ride
Keep your attention on the effort. The trainer handles the resistance, and the app shows you what happened when you finish.
Choose your kind of ride.
Zone 2, tempo, recovery
Zone 2 and Steady Zone 1–3 can follow heart-rate targets when your trainer has room. Tempo and Recovery follow their power targets.
Hard work stays hard
Norwegian 4x4 targets heart rate. Seiler 4x8 and short intervals follow power targets.
See more when you want it
Use ride history and optional training estimates when you want more detail without adding work to the ride itself.
Your workout, without the fiddling.
Steady rides
Post-ride report
Hard intervals
Current app surfaces with illustrative data. Learning and personalization labels have software evidence only; hardware validation remains open.
Different workouts use different targets.
Fixed-power effort
Watts stay at the set target as the illustrative heart-rate line changes.
HR-targeted Zone 2 and Steady 1–3
Resistance can respond to heart rate when the trainer has headroom.
Zone 2 and Steady Zone 1–3 can use heart-rate targets. Norwegian 4x4 also targets heart rate; Seiler 4x8 and short intervals follow power targets.
This illustration explains control styles. It does not compare training outcomes or predict a specific rider's response.
Why the control modes differ.
This hand-drawn software illustration explains the target styles; it is not measured ride data or a hardware-outcome claim. Heart-rate-targeted work adjusts resistance toward an HR range when the trainer has headroom; power-led work follows its prescribed target.
Know what happened.
-
Clear ride reports
See your time in target, heart rate, power, and whether the trainer had enough room to do what the workout asked.
-
History that stays yours
Review past rides and optional training estimates on your phone. Current calibration and learning limits are documented on the How it works page.
-
Detail when you want it
Optional trends and deeper workout analysis are there for riders who want to look closer without making every ride a science project.
-
Follow your ride from the Lock Screen
Live Activity shows heart rate, target range, and power on the Lock Screen and Dynamic Island without unlocking your phone.
-
Keep it private
Your profile and ride history stay on your iPhone. No account, subscription, or server is required.
Want the details?
See which steady workouts and intervals use heart-rate targets, which follow power, and which control and learning limits remain open.
13 Workouts. From steady to hard.
Calibration
- Discover Your Cardiac Response — a guided 20-minute changing-effort ride that records heart-rate and trainer response data
Aerobic Threshold
- Aerobic Threshold Finder — a 35-minute stepped-target ramp for riders who want to explore aerobic-threshold signals from beat-to-beat heart-rate data
Endurance
- Zone 2 Base — 30 to 90 minutes of steady aerobic work; selected phases can use heart-rate feedback when trainer headroom exists
- Tempo — sustained Zone 3 effort, podcast-friendly
- Recovery — easy spinning aimed below Zone 2, with trainer-floor limits called out
- Steady Zone — pick any zone (1–5) and duration; Zones 1–3 use heart-rate targets, Zone 4 follows a power target that HR can lower, and Zone 5 tracks the lower HR boundary without an upper ceiling
Power-Led Intervals
- Sweet Spot — long effort right below your limit
- Threshold — 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 / 4 min easy
- Billat 30/30 — 3 sets of 10 x 30s on / 30s off
- Rønnestad 30/15 — 3 sets of 13 x 30s on / 15s off
- Tabata — 8 x 20s on / 10s off at the prescribed power target
Pick the workout that fits today. Calibration and threshold tools are optional; their current software and hardware evidence limits are documented on How it works.
Advanced: Import a Zwift Workout
Open a .zwo file when you already have a rider-provided workout. Imported steps follow their prescribed power. On steps of 3 minutes or longer, heart rate can lower power when you are above the target zone; shorter steps stay power-led with HR guardrails.
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.
Made for riders who want the ride to feel simple.
Zone Pedal is built by Mark Koivuniemi, a biomedical engineer and indoor cyclist who wanted indoor workouts to run without constant resistance changes. The app is local-only, clear about its limits, and built to get out of the way once the ride starts.
One purchase. Full app.
One-Time Purchase
- All 13 workouts included
- Control that matches the work
- HR-targeted Zone 2, Steady Zone 1–3, and Norwegian 4x4
- Power-led Seiler 4x8 and short intervals
- 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
Standard Bluetooth heart rate monitors are the target input. A chest strap is recommended for the fastest and cleanest control response.
Most Smart Trainers
Zone Pedal can directly control FTMS-compatible smart trainers over Bluetooth for real-time resistance changes during supported rides. Heart-rate control needs your easy Zone 2 power to sit above the trainer's minimum resistance. Zone Pedal checks that headroom during rides and labels the limit instead of reporting clean controller authority when your setup is pinned at the trainer floor.
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.