I’ve tracked my own HRV with a Polar H10 for a long time. Most tools give a morning spot check or a watch’s overnight average, and I wanted every beat from the whole night, so I built an iOS app that records it.
It needs a Polar H10 or Verity Sense, because it reads the raw RR intervals over Bluetooth. It won’t work with other straps or a watch alone.
What it does with a night:
Cleans ectopics and dropouts out of roughly 20,000 beats
Finds a quiet, stable window in the sleep (about 400 beats, DFA a1 between 0.75 and 1.0, steady HR, low artifact rate)
Computes ln(RMSSD) and DFA a1 on that window
Scores it against up to 60 of your own nights
Most people here use a1 during exercise to find VT1. At rest overnight it’s much less settled, so the app reports it next to RMSSD, not instead of it. If you’ve looked at resting a1, I’d like to hear whether you think it adds anything.
It doesn’t connect to intervals.icu. It exports RR intervals and summaries as CSV, and workouts go to Apple Health. Would writing nightly HRV to your intervals.icu wellness data be useful to you?
It’s free for 30 days, then $9.99 once, no subscription. I have 20 codes for a free unlock for anyone with an H10 who’ll tell me what’s wrong with it. Reply here and I’ll DM you one.
It’s free to download with a 30-day trial, then $9.99 once. No subscription and no account. It works with a Polar H10 or Verity Sense. Thanks to everyone who tested it here.
(The title still says testers wanted and I can no longer edit it. If a moderator could change it to “Emuqu: overnight HRV and DFA a1 from a Polar H10 (iOS, now on the App Store)”, I’d appreciate it.)
@Doublez sorry for the wait. The forum doesn’t allow DMs, so here’s a free code instead (one use, good through Dec 31): 4WJREK6MFKEMRETKAF. Redeem it in the App Store app: tap your profile picture, then Redeem Gift Card or Code. Even without it, the App Store version has a 30-day free trial. I’d like to hear how it does with your H10.
This will be my last post here. I built something I believe nobody else offers: every beat of the night from a Polar strap, open source, no subscription. I shared it in the forum’s own External Projects category, and it was flagged as spam. Message received. I’ll put my time where it’s welcome. Thanks to the few who were curious, and best of luck to the rest of you.
Your posts were automatically flagged as spam by the forum due to you being a new user and repeatedly posting the same link. You are still more than welcome to continue posting on the forum and developing your app. You are also encouraged to engage with wider discussions on the forum.
Thanks, Ben. I appreciate you taking the time to explain that, and I’m sorry for the frustration in my last post. I read the flags as the community saying I wasn’t welcome, so knowing it was the automatic new-user filter catching the repeated link changes things. I’ll stick around, keep links to a minimum, and join the wider discussions. Thanks to MedTechCD for fixing the title too.