Building In Public
Introducing: Morning Stability v1.1
April 11, 2023

Morning Stability is a score that calculates the stability of your body's signals. Many people find it helpful for understanding how their body is doing and guiding their pacing for the day.

We launched the first version of this score 2 months ago and have since collected an additional 12 million data points from people with ME/CFS and Long Covid. Using this data, we've created a new and improved version of the Morning Stability score.

What updates have we made?

Extending the baseline

We now calculate your Morning Stability using a significantly extended baseline. Previously, the algorithm only looked at the most recent 14 days of data. We now look at up to 90 days of historical data when calculating your "normal range." This helps us understand what "stable" looks like for you, especially if you're experiencing an extended crash that may last for a couple of weeks.

Introducing personalized normal ranges

In the new version of the score, we make small adjustments to your normal range by taking into account how much your biometrics typically fluctuate. This means that some people will have narrower or wider normal ranges than others. By adding this layer of personalization, we can more accurately calculate your Morning Stability.

Improved check-in journey

As part of this work, we've updated the design of the morning check-in screens. The new morning check-in removes unnecessary screens, provides clearer instructions on how to take a high-quality reading, better educates new users of Visible, and reduces screen brightness.

We hope that these small changes add up to something much bigger and make it easier for you to take a measurement every morning. As always though, we'd love to hear your feedback.

What's next?

Collecting more data

With tens of thousands of people with ME/CFS and Long Covid checking in each day, the Visible dataset is already one of the most comprehensive for understanding these conditions. Learning from this data unlocks improvements in our algorithms, so the more data we collect, the more accurate our algorithms can be.

Focusing on high HRV values

In general, a higher and more stable Heart Rate Variability (HRV) is a positive indicator of better health. One limitation of the current version of the Morning Stability score is that high HRV values outside your normal range are marked as an indicator of instability and can result in a lower Morning Stability score. We're looking into ways to better determine when high HRV is a warning sign and when it's a positive thing, so we can include this in the score too.

What else are we working on?

Visible Plus

We're continuing to develop our wearable subscription, Visible Plus. We've been emailing those on the waitlist to join our Early Access program. If you're interested in joining the program and haven't already signed up for the waitlist, you can do so from the Profile tab of the Visible app.

Research partnerships

We're working with academic institutions, including Imperial College London, to introduce academic studies to the Visible app. This will allow you to opt-in to share your data with researchers to move the science on Long Covid and ME/CFS forward. More info coming soon!

Thanks for your support

Thank you so much for helping test and build Visible. As you can see from this blog post, you're helping to make Visible better every month.

Please continue to message us via the "Help and Feedback" section, especially on how you're getting on with the new version of the Morning Stability Score. We read every message, and we'll always respond!




Harry Leeming

Stop guessing, start measuring.

Join our movement as we improve the understanding of invisible illness.