Keho: Endurance Coach & Stats
Sync Polar Flow to Health
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Your personal endurance sports coach on your iPhone
Your readiness, every morning — computed on your iPhone. And everything your Polar watch records, finally in Apple Health.
Keho reads last night against your own baselines and gives you one honest verdict for the day ahead. No account, no cloud, nothing leaving your phone.
EVERY MORNING: YOUR READINESS
• A readiness verdict and one suggestion, measured against your own baselines
• On the Home screen, in Home Screen and Lock Screen widgets, and from Siri
• An optional notification the moment last night's data lands
• On iPhones with Apple Intelligence, your briefing is written on-device
Honest numbers, never a lecture. Always advisory, never medical advice.
WHAT POLAR FLOW DOESN'T SYNC — KEHO DOES
• Sleep stages — light, deep and REM, not just "asleep"
• 24/7 heart rate, not only workouts
• Breathing rate, blood oxygen (SpO2) and body temperature
• Polar-only metrics kept for you: sleep score, Nightly Recharge, cardio load
Connect once and Keho syncs quietly in the background. Polar's own API serves only about four weeks of history — Keho keeps every day from the moment you connect.
AN EARLY WARNING WHILE YOU SLEEP
Keho measures each overnight vital — sleep duration, resting heart rate, breathing rate, temperature — against your own typical range, and tells you when two or more drift at once. Often the first sign you are coming down with something.
ADVANCED STATISTICS
• Per-sport totals, trends and personal bests
• Age-graded race results from the official WMA road tables
• Heart-rate zones anchored to your real thresholds
• Sleep debt, sleep regularity and long-term sleep trends
• Streaks and consistency that rest days cannot break
• Apple Watch activity rings, steps, floors and daily averages
• Workout maps, splits, zones, pace, power and cadence
GO DEEPER
• Training load and form — your fitness, your fatigue, and the balance between them
• A long-term VO2max trend estimated from your own runs
• Weekly goals for the sports you care about
WORKS WITHOUT A POLAR WATCH
No Polar? Keho reads whatever already writes to Apple Health — Apple Watch, Garmin or anything else — and gives you the same readiness, statistics and widgets.
PRIVATE BY ARCHITECTURE
No account. No sign-up. Every sync, every statistic and every briefing runs on your iPhone. Your health data lives in Apple Health and never leaves the device — we could not read it if we wanted to.
FAIR BY DESIGN
Statistics are free forever. Polar sync and the advanced statistics are paid, with a lifetime option that never becomes a subscription. Everything already synced stays yours, even if you stop. Try all of it free for 30 days.
Keho is an independent app, compatible with Polar® devices and accounts. Polar and Polar Flow are trademarks of Polar Electro Oy. Keho is not affiliated with or endorsed by Polar Electro Oy or Apple Inc.
Questions or feedback? support@coinlex.com
Website: https://www.keho.app
Privacy Policy: https://www.keho.app/privacy-policy
Terms of Use: https://www.keho.app/terms
Ratings & Reviews
The developer, Coinlex, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Thaiss GbR - Coinlex
- Size
- 44.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 7 more
- English, Danish, Dutch, Finnish, French, German, Norwegian Bokmål, Swedish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Advanced Statistics $4.99
- Polar Sync Yearly $4.99
- Polar Sync Lifetime $7.99
- Copyright
- © Coinlex