Your body - your training

Daily readiness. Smarter training.
All on your device — no data leaves your phone.

🫀 Daily readiness
Know whether your body is ready for hard training or needs recovery — based on HRV, resting heart rate, sleep and training load, all calibrated to your personal baseline.

⚖️ Training balance
See how your easy, controlled and hard training is distributed over the last 7, 14 and 28 days. Built on Seiler's 80/20 principle for endurance athletes.

✨ AI coaching* (PRO)
Get weekly training narratives and explanatory insights powered by Apple Intelligence — processed entirely on your device. No data leaves your phone.

🎯 Tomorrow's direction
Based on your readiness and recent training load, Rennr tells you whether tomorrow calls for intensity, easy effort, or rest. A direction — not a training plan.

* Requires Apple Intelligence — iPhone 15 Pro or later with iOS 18.1+

Rennr describes — it does not prescribe. All calculations are relative to you, not population norms.

Page updated

Google Sites

Report abuse

Your body - your training

Daily readiness. Smarter training. All on your device — no data leaves your phone.

Daily readiness. Smarter training.
All on your device — no data leaves your phone.