Your workout, reviewed.
On your phone. Never on a server.
Layrd reads your wearable and tells you what actually happened in your last session — the effort, the form, the cost. No coaching. No motivational copy. Just the numbers your watch collected, explained.
Run · Ride · Swim
Reviewed, not just shown
A paragraph that explains the session.
Most fitness apps display numbers. Layrd writes a paragraph that explains what happened — the effort, the form, the cost. Plain English. Readable in ten seconds.
Training load
See when you're loading and when you're digging.
Training load uses Banister's TRIMP — a public method that combines duration with average heart rate. Simple, transferable across sports, legible at a glance.
Running form
Cadence, oscillation, ground contact.
For running: cadence, vertical oscillation, ground contact time, stride length — read against Heiderscheit's research and Daniels' pacing tables. Layrd shows what's there.
Sleep & recovery
The context next to the session.
Sleep, heart rate variability, resting heart rate — pulled from HealthKit, alongside the session they affected. You see at a glance whether you ran a hard session on four hours of sleep.
Built on real science
Public methods. Math on your device.
Training load uses Banister's TRIMP. Running form draws on Heiderscheit's cadence research and Daniels' pacing tables. RPE is computed against percent-of-max heart rate, not heart rate reserve. The methods are public, the math is on your device, and nothing here is invented marketing.
TRIMP
Load
%HRmax
RPE
Heiderscheit
Cadence
Daniels
Pacing
Privacy is the product
No backend. No third-party SDKs. No account.
Your workouts never leave your iPhone.
No backend. No cloud sync. HealthKit stays on the device, and so does the review.
No third-party SDKs that touch workout data.
Firebase Analytics is used for anonymous app-usage telemetry (crash reports, feature usage). It never sees your HealthKit data.
No account.
No sign-up. No email. No profile. The app works from the moment you install it.
The AI runs on your phone.
Apple Foundation Models, on-device — the same hardware that runs your keyboard predictions. We can't see your data because we never receive it.
Compatibility
Works with the watch you already own.
iPhone running iOS 26 or later, and any smartwatch that records workouts to Apple Health. If it writes to HealthKit, Layrd reads it.
Run
Outdoor · treadmill
Cycle
Outdoor · indoor
Swim
Pool · open water
Other workout types are read but not yet given a sport-specific review.
Read your session. Not just your numbers.
Free. No subscription. No in-app purchases. No ads. Available on the App Store.