Guides · six short reads
the numbers,
in plain words
Short explainers for the readings RestUp gives you. Each one defines the term first, then says how RestUp calculates it, then what it can and cannot tell you.
Hi, I’m Aman.
I build RestUp on my own, and these are the guides I wish my own watch had come with. No black box: every weight and threshold the app uses is written down here, along with where it stops being useful.
— Aman
New to readiness scores?
Start here. Three reads, in order.
The first one defines the terms the rest use, so the rest read faster.
All six guides
Or start with the question you actually have.
- Start here · 7 min“What does my 78 actually mean?”
How the readiness score works
The five things RestUp weighs each morning, how each is compared with your own baseline, and what the bands mean.25 · 25 · 20 · 20 · 10 = 100
- Guide · 4 min“Why didn’t Saturday’s lie-in fix my week?”
Sleep debt, explained
What sleep debt is, how RestUp counts it against the target you set, and why a lie-in repays only part of it. - Guide · 4 min“Am I a lion, a bear, a wolf or a dolphin?”
Chronotype: lion, bear, wolf or dolphin
How your body’s preferred sleep window is read from real nights instead of a quiz, and what social jet lag means. - Guide · 5 min“Is my HRV good?”
HRV against your own baseline
Why a single HRV number means little, what a personal baseline is, and what being below it does and does not mean. - Guide · 5 min“Apple has Readiness now. Do I still need an app?”
Apple Watch now has a Readiness score. Do you still need an app?
What Apple’s built-in feature shows, which watches get it, and where a third-party app still earns its place. - Guide · 4 min“Will it work with the watch I already wear?”
Readiness on Android, from Health Connect
What Health Connect provides, which watches and bands feed it, and what differs from the iPhone version. How these are written
Every guide defines the term first, then says how RestUp calculates it, then what it can and cannot tell you. Each one ends with its sources.
- Figures about RestUp come from the app’s own scoring code.
- Facts about other products and research link to their sources.
- RestUp is a wellness companion, not a medical device.
Pick your path by device
What’s on your wrist?
- iPhone · Apple Watch
Own a Series 12 or Ultra 4? Read this one first.
Apple’s own score may be all you need. The guide says plainly where it stops.Apple Watch Readiness guide - Android · Health Connect
On Android? See which watches give a complete reading.
Which ones give the full picture, and which leave gaps.Health Connect guide