Overview
The Stability Score is a daily snapshot of your body’s signals
1 is the lowest score, indicating a need to rest
5 is the highest, which indicates that your body is looking more stable
The 7-day charts give you a view of how your signals have been changing recently
A higher Stability Score means your body’s signals are more stable
Your Stability score ranges from 1 to 5 and reflects how stable your signals are:
1: Out of balance - Your body’s signals are indicating reduced resilience. This is usually a strong sign that your body needs to rest today.
2: Out of balance - One of your body’s signals is unstable. This is usually a sign that a quieter, more restful day would be helpful.
3: Slightly out of balance - Your body’s signals are within their typical range. This means that your body is no more or less resilient than an average day for you. Keep pacing today, if you can.
4: Stable - At least one of the factors that contribute to your score is positive, compared to your typical range.
5: Stable and improving - All of your body’s signals are looking good today.
Important: Use the Stability Score to support informed pacing decisions. It is not feedback on your overall condition.
Stability Score reflects 4 key factors
Stability Score combines the following biometrics and self-reported data:
Resting heart rate (HR)
Heart rate variability (HRV)
Your self-reported sleep quality from your Morning Check-in
Your self-reported symptom severity from your previous day's Evening Check-in (optional)
Your Stability Score breakdown
Tapping on the cards Resting heart rate, HRV, Sleep or Symptoms will expand the card to show your data over the last seven days.
Tap anywhere on a chart to see the exact numbers or ratings for each day.
The charts show your data as well as your normal range for the past 90 days. Your Stability Score is mostly calculated by comparing today’s score against your normal range.
Larger changes from your normal range have a bigger effect on your score
The Stability Score calculation looks at how far each factor is from your average over the last 90 days. And whether any changes signal greater or lower stability. This means the effect of each factor on your score will vary from day to day.
For resting heart rate and HRV, Stability looks at whether today’s measurement is within, lower, higher, or much higher than your normal range.
For sleep and symptoms, Stability Score looks at whether it’s around, better, or worse than your average.
How each factor signals greater stability
Each factor is scored independently. It’s important to understand that in some cases, a higher number is better, and in others, a lower number is better. Let’s break it down:
Resting heart rate
In chronic illness, your resting heart rate tends to run higher when your body is under strain, and lower when you’re better recovered. A resting heart rate within or lower than your normal range is generally a good sign of stability.
Heart rate variability
Heart rate variability (HRV) can be a useful indicator of your wellbeing over time.
HRV above average is often a sign of better recovery
Reduced HRV can be a predictor of fatigue severity
Large or sudden swings in HRV in either direction signal instability
Steadily increasing HRV over time generally points to increasing resilience.
Sleep
Sleep plays an important role in managing chronic illness. While biometrics paint a picture of how deeply you’ve slept, how you feel about your sleep is just as important when evaluating your capacity for the day.
Sleep is scored based on both how you felt after last night’s sleep and how it compares with your usual pattern. A bad night’s sleep can still signal lower stability, even if it’s typical for you.
Symptom severity
Symptom severity lower than usual is a signal of greater stability, while higher symptom severity can signal lower stability.
Stability Score uses the symptom information recorded in the previous day’s Evening Check-in. This self-reported data helps paint a clearer picture of how your body is doing. You can add or remove symptoms you track at any time by going to Profile → Trackers.
If you forget to do your Evening Check-in, your score will be calculated using the other three factors: resting heart rate, heart rate variability (HRV), and sleep quality.
Why don't I get a higher Stability Score when my heart rate metrics are improving?
Why don't I get a higher Stability Score when my heart rate metrics are improving?
A lower resting heart rate (HR) and a higher heart rate variability (HRV) are generally positive signs. However, they can still represent a change from your personal baseline. The Stability Score treats any change from your normal range as potentially significant, so nothing is missed.
If you consistently see improved readings, your baseline will adjust over time, and your score will update to reflect this.