Anonaconda Code Lab
What it does
Morning HRV reading
1 to 5 minutes, lying, sitting or standing, from the strap’s beat-to-beat intervals. You get lnRMSSD, RMSSD, resting heart rate, breathing rate and a 0–100 score, with glitches and skipped beats left out.
Compared with you, not with others
After 7 mornings, your 7-day average is compared with your own 60-day usual range: lower than usual, in your usual range or higher than usual, explained in plain words. HRV varies too much between healthy people for population grades to mean much.
Standing test
An optional orthostatic test after the morning reading: your heart-rate jump on standing, where it settles, and the 30:15 ratio, tracked over time.
Breathing guide
A calm, glowing pacer from 3 to 7 breaths a minute in half steps, box breathing, 4-7-8 or your own timings, with soft chimes. With the strap on, watch your heart rate rise and fall with each breath.
Resonance pace test
Guides you through five paces for two minutes each and finds the pace at which your heart rate swings most with your breath.
Open sessions
Meditate with no guide at all while your heart rate and HRV are tracked quietly, with a start-versus-end summary.
Trends that talk
Charts of your score, usual range and resting heart rate, a weekly summary, and comments such as “lower than usual for 5 days” or “heart rate up, HRV down”.
What affects you
Optional tags (alcohol, poor sleep, hard training, stress…), sleep score and hours slept. After a few weeks the app shows how each relates to your HRV.
Training guidance
A daily suggestion based on published HRV-guided training research: go as planned, keep it easy, or rest.
Import from Elite HRV
Bring your Elite HRV history across from its export. Every reading is recalculated with Still Point’s own method, so your baseline is ready on day one.
Private by design
No account, no server, no analytics. Everything stays in your browser on your phone; export a backup or a spreadsheet whenever you like.
Works with most chest straps
A Polar H10 or any strap that sends the standard Bluetooth heart-rate signal with beat-to-beat intervals. Each reading notes the strap, and Trends tells you if your baseline mixes straps.
Try it without a strap
A simulated strap lets you explore every screen before you buy a strap.
What you need
- A Polar H10 or any standard Bluetooth chest strap that sends beat-to-beat intervals, such as a Garmin HRM-Dual or HRM-Pro, Wahoo TICKR, Coospo, Magene or Decathlon strap (a Polar H9 also works).
- Google Chrome or Chromium on Android, or Chrome or Edge on Windows, macOS, ChromeOS or Linux.
- Or the Android app, which needs no browser at all.
- iPhone and iPad aren’t supported: Apple doesn’t allow websites to use Bluetooth.
Questions
Which heart-rate straps work?
The Polar H10, and any chest strap that sends the standard Bluetooth heart-rate signal with beat-to-beat intervals: for example Garmin HRM-Dual and HRM-Pro, Wahoo TICKR, and straps from Coospo, Magene and Decathlon. Many watches that broadcast heart rate send heart rate only, without the beat-to-beat data HRV needs; Still Point tells you if a device can’t be used for readings.
Is Still Point really free?
Yes. There is no subscription, no account and no ads. If you find it useful, you can support it on Ko-fi.
Where is my data stored?
Only in your browser on your own device. Nothing is uploaded anywhere. Use Save all to file to keep a backup or move to another phone.
How is the HRV score calculated?
It is lnRMSSD, the standard measure for short readings, on a 0–100 scale (lnRMSSD × 100 / 6.5). On clean readings it matches the HRV number in Elite HRV.
Can I move from Elite HRV?
Yes. Request your data export in Elite HRV, then choose the downloaded .zip in Still Point’s settings. Your readings are recalculated and your baseline is ready immediately.
Does it work on iPhone?
Not at the moment. Safari and every other iPhone browser block Bluetooth for websites.
Can I install it like an app?
Yes: install the Android app, which keeps going with the screen off, or in Chrome on Android tap Install in the web app. Either way it gets its own icon and works offline.
Why isn’t the Android app on Google Play?
Publishing there means registering with Google and handing over government ID, and Google is extending that check to apps installed from elsewhere. We think you should be able to install software you choose on a phone you own, so we support Keep Android Open and offer the app directly. The Android page explains how to install it and check it’s the official build.
Is the code open?
Still Point is free software under the GNU GPL v3. The source code is on GitHub, and every Android release is built from it automatically, with a checksum to verify the download.
Is it a medical device?
No. Still Point is for general wellness, relaxation and training. It cannot diagnose or rule out any condition. If you feel unwell, see a doctor.
Still Point is for general wellness only and is not a medical device. Slow breathing can make some people light-headed; stop and breathe normally if it does.