The Apple Watch app

Your iPhone works out your scores and sends them to your watch whenever they change. The watch shows them; it never calculates on its own. It runs on every Apple Watch from Series 4 with watchOS 10.

The watch app

The same pages as Today on your iPhone: Energy, Recovery, Sleep and Strain. See Energy and Recovery.
Each score on the same open arc, with its band word and symbol.
The refresh button, top left, asks your iPhone for a fresh score.
The details button, top right, shows which signals moved your score.

Complications

Complication	Shows
Push Recovery	Your score, 0 to 100, and its band
Sleep	Last night against your target
Strain	Today's load against your usual day
Stress	Your derived day curve
Steps	Steps so far against your usual day
Biological Age	The current estimate

Each comes in circular, rectangular, corner and inline styles. Add them from the watch face editor or the Watch app on your iPhone.

Rectangular complications add a gauge bar under the number, so you can read it at a glance. Biological Age has no bar.
Push Recovery's rectangular style also shows the score fixed overnight when the day has moved Energy away from it.
A number from an earlier day loses its bar, and is marked as not today's.
In the Smart Stack, Push Recovery rises to the top when your new score arrives in the morning.

What the watch may say instead

Message	Meaning
Building Your Baseline	Fewer than seven nights so far. It shows the count.
No Overnight Data	No sleep was recorded last night.
Waiting for Your iPhone	Nothing has arrived yet. Open Push on your iPhone, or tap Check Again.
Set Up on iPhone	Health access is not turned on in Push on your iPhone.
Push Isn't on Your iPhone	Install Push on the paired iPhone.

Push is free on the App Store, for iPhone and Apple Watch.

Push is a general wellness feature, not a substitute for professional medical judgment, does not account for existing conditions or medications.