Coaching in your ear.
Spoken cues for fueling, heart rate and intervals.
- “20 minutes in. Time for 19 grams of carbs.”
- “Heart rate is in zone 4. This is a recovery run.”
- “Rep 3 of 6 starts now.”
Leave the watch at home.
Wrist Zero turns your phone and a heart rate strap into an ultra coach. Heart rate, GPS and spoken cues on every run, sent straight to Strava.
You already carry the computer.
Your phone has GPS, a barometer and more power than any watch. A heart rate strap costs a fraction of a high-end watch. Wrist Zero connects the two, so your training data doesn't depend on what's on your wrist.
How it works
1. Pair your strap.
Any standard Bluetooth heart rate strap or armband.
2. Run with your phone in your pocket.
Wrist Zero records heart rate, GPS and elevation, and talks to you through your headphones.
3. Send it to Strava.
Your run lands in Strava with full heart rate data, like it came from a watch.
What you get at launch
Plan every run.
Set the intent before you start: zone 2 for 80 minutes, 56 grams of carbs an hour, 375 ml of water. Wrist Zero keeps you on it.
One-tap fuel log.
Answer "Took it" from your lock screen and your fueling is tracked without stopping.
Your data stays on your phone.
Runs are stored on your device. Nothing syncs unless you turn it on.
Coming soon
Systems Training
See which systems you're training: engine, legs, fueling, heat, mind, gear and race execution, mapped against your goal race.
Twinge tracking
Log a sore spot, answer quick daily check-ins, and get clear guidance on when to back off, before a twinge becomes an injury.
Built for long days.
For runners training for mountain 100-milers, multi-day stage races and big personal objectives, and anyone who'd rather spend on race entries than on a watch.
Questions
Do I need a watch at all?
No. You need a phone and a Bluetooth heart rate strap or armband.
Which straps work?
Straps and armbands that use the standard Bluetooth heart rate profile, which covers most current models. We'll publish a tested list at launch.
Does it work with Strava?
Yes. Connect your Strava account once and runs upload automatically.
How much will it cost?
Waitlist members hear first and get early access.
Is my data private?
Your runs are stored on your phone. Syncing is opt-in, and we never sell your data.