apple watch now has a readiness score. do you still need an app?
On 9 September 2026 Apple announced a native Readiness score for Apple Watch. It is a real feature, it is free, and if you have the right watch you should try it first. This page is the plain version of what it does, who gets it, and where an app like RestUp still has a job. It is written by the maker of RestUp, so weigh it accordingly.
What Apple's Readiness score is
Apple’s Readiness score is a single number from 0 to 10, paired with one of four recommendations: Recover, Pace Yourself, Ready, or Go For It. Apple says it is built from recent activity, training load, vitals and Sleep Score, and that it updates through the day as new data comes in. Alongside it, overnight vitals gain a Recovery HRV reading analysed against your personal baseline, and a new daytime vitals view. Readiness lives in a dedicated Readiness app on the watch. Apple lists it only for Apple Watch Series 12 and Apple Watch Ultra 4, in stores from 18 September 2026; its compare page shows no Readiness app for earlier models, which can install watchOS 27 from 14 September.
Which watches get it
- Readiness and Recovery HRV: Series 12 ($399) and Ultra 4 ($799) only, per Apple’s compare page and launch announcements.
- Sleep Score (0–100): Series 6 and later, SE 2 and later, and every Ultra on watchOS 26 or newer. Older watches got this by software update in 2025.
- Vitals (overnight heart rate, respiratory rate, wrist temperature, blood oxygen and sleep duration): on supported models, without Recovery HRV or a readiness number. Blood oxygen is unavailable on some US models.
- Not on any model: a sleep debt figure or a chronotype reading, as of the date on this page.
So the honest split is: if you have a Series 12 or Ultra 4, Apple now covers the core of what a readiness app does. If you have a Series 11, Ultra 3, SE 3 or anything older, which is most Apple Watches in the world, Apple gives you a Sleep Score and vitals but no readiness reading and no HRV baseline.
What Apple's version leaves out, on every model
- Sleep debt. Apple’s Sleep Score rewards duration and consistency on the night, but there is no running ledger of what you owe. RestUp’s seven-night sleep debt is exactly that ledger.
- Chronotype and social jet lag. Apple does not tell you whether you are a lion or a wolf, or how far your weekend drifts from your weekday. RestUp’s chronotype reading is built from the same sleep timing Apple already records.
- A published method. Reviewers have criticised Apple’s Sleep Score for ignoring heart rate, HRV, breathing and temperature, and for an algorithm no sleep body has publicly validated. Apple has not published how Readiness is weighted. RestUp documents every component and threshold.
- A sentence, not a verdict. Apple’s four labels are useful. RestUp adds the why: which of sleep balance, recovery, training load, nervous-system balance or consistency moved the number, and a weekly digest that reads the week back to you.
Side by side
| RestUp | Apple Readiness | |
|---|---|---|
| Watches | Any Apple Watch that records sleep and heart rate | Series 12 and Ultra 4 only |
| Score | 0–100 with a plain-words band | 0–10 with Recover / Pace Yourself / Ready / Go For It |
| HRV vs personal baseline | Yes, 14 nights | Yes, on Series 12 and Ultra 4 |
| Sleep score | Yes, 0–100 | Yes, 0–100, Series 6 and later |
| Sleep debt | Yes | No |
| Chronotype | Yes | No |
| Method published | Yes | No |
| Where computed | On your phone | Not stated by Apple |
| Cost | Free week, then RestUp Plus | Included with a new watch |
So, do you still need an app?
If you have a Series 12 or Ultra 4: try Apple’s Readiness first. It is free, it is on the watch face, and it reads the sensors more directly than any third-party app can. Add an app only if you want sleep debt, a chronotype, or to understand why the number moved.
If you have any other Apple Watch: Apple has not given you a readiness score or an HRV baseline, and has said nothing about back-porting them. An app is the only way to get one from the watch you already own, and RestUp runs on any watch that records sleep and heart rate.
We will update this page if Apple extends Readiness to older models. The date at the top is the date it was last checked.
Sources
- Apple Newsroom: introducing Apple Watch Series 12 (Readiness, recovery HRV, availability).
- Apple Newsroom: health and fitness capabilities (Readiness inputs, Recovery HRV, daytime vitals, watchOS 27 dates).
- Apple Newsroom: Apple Watch Ultra 4 (price and availability).
- Apple Watch compare page (which models list the Readiness app and Recovery HRV).
- Apple Newsroom, September 2025 (Sleep Score models) and Apple Support: Sleep Score (the 0–100 scale and its components).
- Apple Watch User Guide: Vitals.
- Macworld on the Sleep Score and Gadget Hacks on validation (criticism attributed to those outlets).