Guides
Plain answers to the questions we hear most: what Polar Flow does and doesn’t send to Apple Health, how readiness and HRV work on Apple Watch, which training statistics are worth watching, and how a good plan is built.
Statistics
Apple Watch, readiness & HRV
- A readiness score for Apple Watch, without another wearable What a readiness score is built from, and how to get one from the Apple Watch you already wear.
- HRV explained: SDNN vs RMSSD, and why your numbers disagree Why Apple Watch and Polar show different HRV numbers, and which trend actually matters.
Polar
- Polar Flow and Apple Health: what syncs, and what doesn’t The exact list of what Polar Flow writes to Apple Health, what it leaves out, and how to get the rest.
- Export your Polar Flow data and keep your full history Download your whole Polar account, and keep Nightly Recharge and sleep history longer than 28 days.