NOYU turns what your wearable records into three daily numbers: sleep score, Readiness and Strain. They sit at the top of each day so you can see, at a glance, how you slept, how prepared your body looks, and how much you have taken on.
The three numbers
- Sleep score describes the night that ended this morning. Higher is better.
- Readiness describes how prepared your body looks for the day ahead, based on that same night. Higher is better.
- Strain describes how much physical load you have taken on so far today. It is a measure of how much, not of how well.
That last distinction matters. A high Strain is not a good score or a bad one. A hard training day and a bad night's sleep are both real information, and neither is a grade.
Measured against you, not a textbook
Where it can, NOYU compares a metric to your own rolling baseline rather than a population target. Your HRV is not held up against a number that is normal for a 35-year-old. It is held up against your usual, worked out from a rolling 30-day window of your own nights.
HRV varies between people for reasons that have nothing to do with health, so an absolute HRV number tells you little. The same number compared with your own fortnight tells you a great deal.
NOYU needs a few days of your data before a baseline means anything, so scores settle over your first week or two.
Three things are deliberately not baseline-relative, because a genuine population figure exists and is more useful:
- Sleep duration, measured against a need of eight hours
- Blood oxygen, where healthy overnight saturation sits in a narrow band
- VO2 max, which is comparable between people once age and sex are accounted for
Missing measurements
Different wearables record different things. A chest strap will not tell NOYU your sleep stages; a ring may not report blood oxygen.
When something is missing, NOYU rebalances the score around what it does have and tells you what it left out. A missing measurement is never read as a poor result, and never quietly scored as zero.
One consequence: two members can both have a Readiness of 74 built from a different mix of inputs. Compare your own numbers over time rather than someone else's.
Readiness and recovery are the same thing
You may see both words. Some parts of the app, and some other trackers, call this number recovery.
There is only one number. NOYU shows it as Readiness because it is about the day ahead. If you see it called recovery elsewhere, that is the same value, not a second measurement.
How to use them
One day is mostly noise. A run of days is a signal.
The most useful thing you can do is check whether a score lines up with how you feel. When they agree, you have learnt something reliable about your own patterns. When they disagree, the way you feel is the better guide, and the mismatch is itself worth mentioning to NOYU.
If you want to know why a particular day looks the way it does, ask in the chat. NOYU can see the same breakdown you can and will talk you through what moved it.
