The running app that finally uses all your data.
Stride length, ground contact, HRV, running power. Your Watch measures everything. Apple shows you numbers. We turn them into a personalized training plan.
Beta open. Be among the first to train smarter.
From your data to your finish line
Sync 6 months of runs from HealthKit. We learn your pace, volume, and patterns.
First marathon? Shave 5 min off your 10K? Just stay fit? Tell us where you want to go.
AI builds a plan based on YOUR level. Progressive, injury-aware, adapted to your life.
We sync your session to Apple Watch. You run with the native Workout app, no extra app on your wrist.
Post-run AI feedback on your technique. Track fatigue, aches, and watch yourself progress.
Training that gets you to the start line ready, not injured.
First marathon or new PR: we build progressive plans that respect your body. AI monitors fatigue and adapts before you overtrain.
After each run, AI analyzes stride, ground contact, vertical oscillation. Insights you can act on, not just numbers.
Log aches, monitor recovery, see your KPIs evolve. Your running journey, documented.
"Should I run today?" "Why are my legs heavy?" Ask anything. Get answers based on YOUR data, not generic advice.
Runners who stopped envying their Garmin friends
"I missed Garmin Coach so much. Heyfox gave me everything back—and more. The AI actually understands my data. 3:42 marathon."
Alex
Switched from Garmin
"My Watch collected running power for 2 years. I had no idea what to do with it. Now I do. Finally broke 2 hours."
Sam
Sub-2 half marathon
"Bought the Ultra for running. Then realized the software sucked. Heyfox is the app Apple should have built."
Jordan
Apple Watch Ultra owner