Your next upgrade is a download
Your run.
More powerful.
Free running tools for the .
No account needed to run. No subscription.
Modular · Pro
Your key metrics. One glance.
Scroll
Set it up for how you run.
Big on data. Bold by design.
Choose your look. Put pace, power, or elevation where you want it. Customize in the iPhone app and take it running. Core is free; Pro adds more designs.
Chronograph · tap an outlined slot
A full-bezel tachometer: sweep bezel, zone arc, twin subdials, curved corner widgets — all swappable. Ultra style.
Try it here. Set up your watch in the app.
You already paid for the hardware.
Serious tools. Zero cost.
From your daily loop to a full day on the trails: recording, navigation, and training insights are free. No account required. No subscription.
Know your effort
Pace, heart rate, power, and elevation at a glance. Track splits and laps as you go.
Follow the trail
See your route and live breadcrumb trail. Download topo maps before you head out of signal.
Find your way back
Drop a pin at the car or a water stop. Use the compass and your breadcrumbs to retrace your route.
Keep the miles you earned.
Battery died. Run didn't.
Teo saves your route as you run. Dead battery, crash, force quit: open the app and pick up where you left off.
- Route, every point
- Splits, laps, load
- Save or resume
Understand your training
Put your running data to work.
See your training load, fitness trends, and overnight recovery together. Teo calculates these insights on your device using established endurance training models.
Readiness
Hard day or easy day?
Sleep, nocturnal recovery, resting heart rate, and training balance, in one score out of 100.
Fitness
Are you getting fitter?
Your 42-day training load: the base you have built.
Load
How hard was that run?
Heart-rate impulse for every workout, weighted by zone.
Nocturnal recovery
Did you recover overnight?
RMSSD and sleep heart rate against your own 120-day baseline.
Impulse–response model
Banister & Calvert, 1975
Fitness and fatigue as two decaying responses to every session.
TRIMP
Banister, 1991
One number for a workout's stress, from heart rate and duration.
Zone weighting
Stagno, Thatcher & van Someren, 2007
Blood-lactate multipliers so hard minutes count like hard minutes.
Nocturnal RMSSD
Plews, Laursen & Buchheit, 2013
Overnight heart-rate variability as the recovery signal that actually moves.
Connect your running life
Record with Teo. Share on Strava.
Take Teo on your run, then send your workout to Strava. Keep your running history and community together. Sync is optional and included free.
Strava sync
Connect in the iPhone app with Sign in with Apple and your Strava account. Access may be waitlisted; the app will show you availability. Only workouts you choose to sync are sent to Strava.
More connections coming soon
Your run. Your data.
On your wrist. On your terms.
No account needed to run
Record, navigate, customize your display, and check your training insights without creating a Teo account.
Processed on your devices
Your readiness and training calculations happen on your iPhone and . Your health data stays on your devices unless you choose to share a workout through Strava.
No subscription
Your running tools are free. Pro faces are an optional one-time purchase that supports the developer.
Optional connections require sign-in. Read the privacy details.
Free to run. Yours to keep.
Love the app? Make it Pro.
Keep running free, or unlock Pro faces with a one-time purchase that supports the developer. No subscription. No recurring charge.
Teo
Free
- Run recording and live metrics
- Core face, fully customizable
- Maps and offline topo
- Compass and breadcrumb backtrack
- Run backup and recovery
- Readiness and training load
- Optional Strava sync (access may be waitlisted)
Pro
$9.99 once
One purchase. Every Pro face, now and in the future.
- Modular, Chronograph, and Analog, fully customizable
- Every future Pro face
Unlock Pro faces inside the app. Your free running tools stay free.
Your next run. Powered by Teo.
Free tools for the road, the trail, and the long way home. No account needed to run. No subscription. Optional Pro faces, paid once.
watchOS 10 and iOS 17 or later. Modular, Chronograph, and Analog need a 44 mm or larger watch; smaller watches run Core. These are workout displays inside Teo; they do not replace your watchOS clock face.