Understanding Your Lumia Forecast Score

Every morning, your body already has hints about the day ahead. Whether it's ready to push hard, or hoping you take it a little easier. The Forecast Score is Lumia's way of putting that information in front of you to help plan your day. It's a single number from 0 to 100 that reflects your body's readiness, calculated from three things measured overnight:

• Sleep HRV (heart rate variability): how well your nervous system is recovering

• Sleep RHR (resting heart rate): how rested your heart is at night

• Night ear temperature: a more stable, central measurement than temperature taken at the finger or wrist.

The Forecast Score is personalized to you, baselined off your nighttime data over the past few weeks to help you figure out how your body is doing that day.

What the colors mean

Your score falls into one of three general bands:

• 🟢 Green: a strong score, indicating your body is well-recovered. 
• 🟡 Yellow: a fair, everyday score. This is normal variation, not cause for concern.
• 🔴 Red: a low score, worth paying extra attention to. It should be an uncommon occurrence, not something you see constantly.

The colors are meant to give you a quick read at a glance, while the sub-scores and details underneath give you the full picture.

How we define "typical" for you

A key part of making the score useful is comparing your readings against a range that reflects your body specifically, not a one-size-fits-all system. Rather than judging a single night against your recent high or low, Lumia looks at your broader pattern over time to figure out what's genuinely typical for you versus what's an outlier, so a temporarily unusual night doesn't get mistaken for a problem, and a real change doesn't get lost in the noise. We show both your current typical range as well as your current potential min and max so you understand exactly where the most recent data point lies. 

How is my Forecast Score calculated?

When you click into the Forecast Detail page, you'll see the specific signals that contribute to your Forecast Score. For each signal, we let you know your typical range so you can decide if a shift is normal for you, or if a metric needs attention. The goal is that you can always trace the score back to something concrete happening in your body, rather than wondering what's going on behind the scenes.

What can help increase your score

Forecast Score rises when your resting heart rate is lower than your usual, or your HRV is higher than your usual, both of which usually mean your cardiovascular system recovered well last night.

A few habits tend to support your score:

• Keeping a consistent sleep schedule

• Giving yourself real rest after more active days rather than stacking intensity on intensity

• Staying well hydrated

• Limiting alcohol close to bedtime

None of these are strict rules, but they're the kinds of everyday choices that show up in your trend.

What can decrease your score

A higher-than-usual overnight temperature can pull your Forecast Score down, often as a sign your body is under some kind of stress such as fighting off an illness. Forecast Score can also dip when your resting heart rate is higher than usual, or your HRV is lower than usual, both of which usually mean your body is still working to recover from a tough workout, a rough night's sleep, illness, alcohol, or general stress. 

It's worth knowing that a lower reading isn't always a sign that something's wrong. But, a few habits tend to work against your score:

• Inconsistent sleep schedules

• Stacking intense active back to back without real rest in between

• Being dehydrated

• Drinking alcohol close to bedtime

None of these guarantee a lower score, but they're the kinds of everyday choices that tend to show up in your trend. A lower score on any given day is meant to be information you can use, not a verdict on your health.

Does it match how I feel?

Right after you receive your score, you can quickly tell us how you're actually feeling using "Daily Check-In": rough, okay, or great. This helps you notice patterns over time, and it helps us understand whether the score is truly tracking your reality. The more you check in, the more useful your Forecast Score becomes.

A note on your cycle and other context

For many people, hormonal changes across the month meaningfully affect HRV, temperature, and how ready the body feels on a given day.

Learning the basics

No single metric tells the whole story. If you want to go a level deeper, here's a quick primer on the raw metrics behind your score, with sources if you'd like to read further. 

Heart Rate Variability (HRV)

Heart rate variability is the slight fluctuation in time between your heartbeats. HRV reflects the adaptability of your body. A higher variability is often evidence that your body can quickly adapt to where you are and what you are doing. Learn more here.

Resting Heart Rate (RHR)

Your resting heart rate is your heart's beats per minute while you are awake but not moving. A lower resting heart rate typically means your heart needs to do less to pump blood through your body. 0 to 100 beats per minute is a normal resting heart rate for many adults. Reduced resting Heart Rate over time is often a sign of improved cardiovascular fitness. It can be normal for nighttime heart rates to dip lower than 60 beats per minute for some people. Learn more here.

Temperature

Lumia measures temperature on the ear. Temperature can change slightly depending on your activity level and other factors, but will stay around the same level. For a typical adult, the range is about 97°F to 99°F. Learn more here.

None of this data is intended to diagnose or treat any medical condition. Think of it as a window into your own patterns, not a substitute for medical advice.

What's next

The Forecast Score you see today is a morning snapshot, but it's the foundation for more. Over time, we're working toward forecasts that update throughout your day as we learn how your activity and environment interact with how you feel, so the picture gets sharper the longer you use Lumia. For now, our focus is making sure the number you wake up to is one you can actually understand, and one you can actually trust.