Coach
Splits, milestones, zone changes and a nudge when you leave your band.
Voice running coach · iPhone
Run your pace. Hear when you drift.
ZoneTempo coaches your pace and heart-rate zones with short voice cues — right over Spotify. Built for WHOOP wearers.
Free to run · your first 3 Pro runs are on us
How it works
A coach in your ears. Not on your screen.
ZoneTempo is an iPhone running app that coaches you with short voice cues while your music keeps playing. It tracks live pace in minutes per kilometre and your heart-rate zone, and tells you the moment you drift out of your target — so you never have to look at your phone mid-run.
Set a target
A pace band like 4:55–5:10 /km, a time, or today's workout from your plan — tempo, intervals or a long run.
Press play on your music
Spotify, SoundCloud, a podcast. The coach lowers your music only while it speaks, then brings it back.
Hear what matters
Splits, zone changes, and a nudge when you drift: “Pace five eighteen — pick it up.”
The app
Plan it. Run it. See how it went.
During the run you mostly just listen. Before and after, everything you need is one screen away — and it all stays on your iPhone.
Before
Today's workout from your plan and its pace band. One tap to start.
Your plan
Week by week. Build it, import it, or let Pro generate one to race day.
After
Pace, distance, time and heart rate — and how much you held in band.
Splits and zones
Every kilometre against your target, and time in each heart-rate zone.
Live pace
Pace you can trust. Even in a tunnel.
Raw GPS jumps around. ZoneTempo fuses GPS position with the iPhone's Doppler speed in a Kalman filter, throws out bad fixes, and counts your steps when the signal drops.
- 1%
- Distance error in simulations with realistic GPS noise
- ±2 s/km
- Live pace error after the first 20 seconds
- Steps
- Take over when GPS drops, with stride length learned on the run
Heart-rate zones
Five zones. One voice that notices.
When your heart rate settles into a new zone, the coach tells you — “Zone four, threshold” — and stays quiet while it hovers on a boundary. Percent of max, heart-rate reserve, or your own bpm.
Heart-rate zones guide →The coach
Talks when it should. Quiet when it shouldn't.
Three modes you can switch mid-run and three styles — Hype, Calm or Drill. The coach speaks English or Dutch.
Quiet
Only speaks when you're more than 10 s/km off target for 30 seconds, or when you hit zone 5.
Off
Silence. Your run is still recorded, with splits and time in each zone afterwards.
Works with WHOOP
Your strap knows your heart. Now you can hear it.
WHOOP has no screen and no audio on a run. ZoneTempo is the missing voice. Running with WHOOP →
Live heart rate
Turn on Broadcast Heart Rate in the WHOOP app. ZoneTempo reads that standard Bluetooth signal second by second for zones and heart-rate cues.
Set up in a minute
Onboarding walks you through Broadcast Heart Rate and shows the moment your strap's signal comes in. No extra hardware, no account.
ZoneTempo is an independent app. It is not affiliated with, endorsed by or sponsored by WHOOP, Inc. WHOOP is a trademark of WHOOP, Inc.
Pricing
Free to run. Pro to be coached.
The free coach covers pace, zones and every cue. Pro gives it a natural voice and makes every line about your run. Compare Free and Pro →
Free
€0forever
Everything you need to run your pace, spoken by the iPhone voice.
- Live pace, distance and splits
- Heart-rate zones from WHOOP
- Pace, zone, split and interval cues
- Coach, Quiet and Off modes
- Build or import training plans
3 Pro runs free
Pro
€5.00/ month, billed €59.99 yearly
or €7.99 monthly · save 37% with yearly
A coach that sounds human, knows your name and talks about your run.
- Everything in Free
- 5 natural coach voices
- Your name and humour in every line
- Coach lines written for your splits and zones
- Spoken post-run recap
- AI training plan to race day
FAQ
Questions, answered.
What is ZoneTempo?
ZoneTempo is an iPhone app that coaches you during a run with short voice cues over your music. It tracks your live pace in minutes per kilometre and your heart-rate zone, and speaks up when you drift out of your target pace band or change heart-rate zone.
Does ZoneTempo work with WHOOP?
Yes. ZoneTempo reads live heart rate from your WHOOP strap through WHOOP's Broadcast Heart Rate setting, second by second, for zones and heart-rate cues. ZoneTempo is independent and not affiliated with WHOOP, Inc.
Can I listen to Spotify or SoundCloud while ZoneTempo coaches me?
Yes. Your music keeps playing. When the coach speaks, iOS briefly lowers the music volume and raises it again afterwards. It works with the screen locked.
How accurate is the live pace?
ZoneTempo combines GPS position with the iPhone's Doppler speed in a Kalman filter, rejects bad GPS fixes, and switches to step counting in tunnels. In simulations with realistic GPS noise, distance stays within 1% and live pace within about 2 seconds per kilometre after the first 20 seconds.
How are heart-rate zones calculated?
You choose the method: percentage of max heart rate (50/60/70/80/90%, the same split WHOOP uses), heart-rate reserve (the Karvonen formula, using your resting heart rate), or custom bpm values from a lab or field test.
Will the coach talk all the time?
No. In normal mode it announces kilometre splits, zone changes and when you leave your pace band. Quiet mode only speaks when you are more than 10 seconds per kilometre off target for 30 seconds, or when you reach zone 5. You can switch modes mid-run.
Can I follow a training plan?
Yes. Set a target per run, build a plan day by day, or import one from CSV, ICS (calendar) or JSON. Runs can be open, by distance or by time, including intervals with timed recoveries. With Pro, the coach can also generate a plan to race day from a goal such as a 10K time.
Is ZoneTempo free?
Yes. Pace, heart-rate zones, all rule-based cues, quiet mode and plans are free, spoken by the iPhone voice. Pro adds a natural coach voice, lines written for your run, a spoken recap and AI training plans, for €7.99 a month or €59.99 a year. Your first 3 Pro runs are free, with no subscription needed.
Is my location shared?
No. GPS and heart-rate data stay on your iPhone, and there is no account or login. Pro coaching only receives the numbers it needs, such as pace, heart rate and distance — never your location.
Is ZoneTempo available on Android?
Not at the moment. ZoneTempo is built for iPhone (iOS 17 or later).
Run your pace.
Get early access→Private beta · iPhone (iOS 17 or later) · 3 Pro runs free