A note before you dive in: This is an invite-only Early Access feature.
Early access features are still being tested and refined. While we continue to improve it, you may occasionally experience bugs or issues. For example, on some days, your band may not capture your overnight data.
You can opt out at any time via the Early Access Hub in the Profile tab.
Stability (overnight data) completes your Morning check-in with one click.
By wearing your band overnight, your heart rate and heart rate variability measurements are gathered while you sleep. It means there's no need to sit or lie still for morning measurements.
Stability (overnight data) is now available with Visible Band 2.0
Stability (overnight data) is now available in the Early Access Hub for all members using Visible Band 2.0. Early Access is an invite-only program that lets members try out new features while they're still in development.
If you use Polar Verity Sense, this feature won't be available to you. You'll continue to get your Stability score from morning measurements.
Opt in to Stability (overnight data) in the Early Access Hub
You can switch to overnight measurements by opting in to Stability (overnight data) in the Early Access Hub:
In the app, go to Profile → Early Access Hub
Under Stability (overnight data), tap Find out more
To opt in, tap I understand, start testing
You're now enrolled
How to get your Stability score when using overnight measurements
To get your Stability score, all you need to do is rate your sleep when you have woken up for the day.
Here's how it works:
Before you go to bed: make sure your band has enough charge to last until morning.
Overnight: wear your band.
In the morning: rate your sleep when you open the app. Your Stability score will appear automatically.
⚡ Tip: We recommend having at least 15% battery charge on your band before going to sleep.
Stability score adjusts automatically for overnight data
Stability is based on four factors: heart rate, heart rate variability, sleep quality, and symptom severity.
The Stability algorithm handles the switch from morning to overnight measurements, so you can keep comparing your scores over time.
Your Evening check-in symptoms and morning sleep rating continue to feed into Stability as they always have.
Your HR and HRV measurements are labeled as overnight
Since heart rate (HR) and heart rate variability (HRV) measurements are taken overnight, rather than in the morning, they are labeled as Overnight HR and Overnight HRV across the app.
For example, on the Trends page and in your Health Report PDF, you'll see all four measurements together: Overnight HR, Overnight HRV, Morning Resting HR, and Morning HRV.
Overnight or morning, whichever works best for you
While Stability (overnight data) is in Early Access, it's an opt-in feature. You can switch back to morning measurements at any time by opting out in the Early Access Hub.
As we roll out overnight measurements more widely, we plan to make it the default for members using Visible Band 2.0. But you'll still be able to turn it off and keep using morning measurements if you prefer.
We'll keep you updated as we learn from testing and our plans develop.
Common questions
Can I take a morning reading if I forget to wear my band overnight?
Can I take a morning reading if I forget to wear my band overnight?
No, once you've opted in to Stability (overnight data), you won't be able to take a morning measurement as backup. If you forget to wear your band overnight, you'll miss getting a Stability score that day.
Why am I getting a "Stability score unavailable" message?
Why am I getting a "Stability score unavailable" message?
You'll see the "Stability score unavailable" message in the following circumstances:
there was a technical glitch and we were unable to get enough overnight data from your band to calculate your score. We've already made some improvements to make this more reliable.
your band didn’t have enough battery to record overnight data
you chose not to wear your band overnight
To help avoid this happening again, make sure your band has at least 15% charge before you go to sleep, and that you're wearing it snugly on your wrist or arm while you sleep.
While you're testing Stability (overnight data), you won't be able to take a morning measurement as a backup if your overnight data is not available.
Why am I getting a "No internet connection" message?
Why am I getting a "No internet connection" message?
Visible needs an internet connection to calculate your Stability score. If you see the error message "No internet connection," check your connection and tap Try again. You can retry as many times as you need.
Why am I getting a "Band connection error" message?
Why am I getting a "Band connection error" message?
Your band needs a strong connection to your phone to get your overnight data and calculate your Stability score. If you see the error message "Band connection error," keep your band close to your phone and tap Try again. You can retry as many times as you need.
If you continue to get a band connection error, try our Visible Band 2.0 connectivity troubleshooting.
What happens if my band runs out of battery overnight?
What happens if my band runs out of battery overnight?
If your band runs out of battery overnight, you won't get a Stability score for that day. Make sure your band has at least 15% charge before bed to avoid this.
Why can't I delete my Stability score when using overnight data?
Why can't I delete my Stability score when using overnight data?
With morning measurements, you can delete and retake your score if something interrupts your reading (like a sneeze).
With Stability (overnight data), this is not necessary, as the band automatically captures data across hours of sleep and filters out disrupted periods.
Why do I still have to rate my sleep if Visible has my overnight data?
Why do I still have to rate my sleep if Visible has my overnight data?
We need your sleep quality rating to calculate your Stability score, even if you are also testing Early Access Sleep tracking.
Stability (overnight data) and Sleep tracking are both only available in Early Access, and the two features aren't fully connected yet. We're still working on making high-quality automated sleep tracking more widely available.
Find out how to share feedback on Stability (overnight data). Your feedback will go directly to the team working on the feature.