The question landing in every Apple Watch thread this week is the same one. Will my Series 11 get Readiness? What about Ultra 3, Ultra 2, Ultra 1, SE 3, or Series 10, 9, 8 and 7? Apple's own score is on two watches: Series 12 and Ultra 4. Fitcoin already does readiness on every other model. That is the point of this page. Wear the watch overnight and you get a morning number. Turn on AFib History if you want more HRV through the day, which makes Energy, readiness and Stress more accurate. You do not need a new Watch for the score itself.
The short version
Fitcoin does readiness on every Apple Watch and every Ultra. Series 12, Ultra 4, Series 11, Ultra 3, Ultra 2, Ultra 1, SE 3, SE 2, Series 10, 9, 8 and 7. Apple's Readiness app is the thing locked to Series 12 and Ultra 4. Ours is Recovery in the morning, Energy through the day, and it already reads the Health samples your watch writes. Sleep in it and you have a score tomorrow. AFib History is optional. Turn it on if you want extra daytime HRV and a tighter read. Leave it off and overnight Recovery still works. The announcement of Apple's tile is in Apple Watch Readiness Score: Series 12, Ultra 4 and how it compares.
Disclosure: I build Fitcoin. We read the same Apple Health samples your watch already writes. Where Fitcoin appears below, that is ownership, not a hidden review. Wellness estimates only, not medical advice.
What Apple actually shipped
On 9 September 2026 Apple announced a Health Sensing System on Series 12 and Ultra 4. Heart rate is sampled every five seconds. HRV is measured as often as every five minutes, which Apple says is 24 times more often than before. On top of that sits Readiness: a 0 to 10 score with four labels, Recover, Pace Yourself, Ready or Go For It. It looks at recent activity, training load, vitals and sleep score, and it can move during the day as new samples arrive. The Newsroom release is the source for those figures.
watchOS 27 is a separate thing. It is free from 14 September for Series 9 and later, SE 3, and Ultra 2 and later. Apple's own watchOS 27 list does not include Readiness. The score is named on the Series 12 and Ultra 4 pages. That is the split people are missing when they assume the software update brings the score.
Which watches get Apple's score
This is the table I wish Apple had put on one page.
| Watch | watchOS 27 | Apple Readiness | Fitcoin readiness | AFib History for extra daytime HRV |
|---|---|---|---|---|
| Series 12, Ultra 4 | Yes | Yes | Yes | Optional. Hardware is already dense |
| Series 11, 10, 9 | Yes | Not listed | Yes | Optional. Makes Fitcoin more accurate |
| Ultra 3, Ultra 2, SE 3 | Yes | Not listed | Yes | Optional. Makes Fitcoin more accurate |
| Series 8, 7, SE 2, Ultra 1 | No | No | Yes | Optional on Series 4 and later |
Apple has not published a support document that says Series 11 is technically incapable of a daily score. It has tied its own app to the new sensors. Those sensors are why daytime HRV gets so much denser. A morning number from last night does not need that cadence, which is why Fitcoin already scores every row in that table. Does Apple Watch have a readiness score? is the older version of this argument.
Fitcoin readiness on every model
This is the product sentence, so I will not bury it. Fitcoin Recovery is the morning readiness call. Energy is the tank that can move later. Both read Apple Health: overnight HRV, resting heart rate, sleep and training. Series 12 and Ultra 4 work on day one. So do Series 11, 10, 9, 8, 7, SE 3, SE 2, Ultra 3, Ultra 2 and Ultra 1. If the watch writes last night to Health, we score it.
AFib History does not unlock Fitcoin. You already have the score without it. What it unlocks is more daytime HRV, which tightens Energy, the live readiness nudge and the Stress chart. Overnight Recovery still uses last night either way. Wear the watch to bed. Open Fitcoin. That is the whole path.
Download Fitcoin if you want the number on the watch you already own. Athlytic, Bevel and Gentler Streak also read Health. I built this one, so that is the one I can stand behind.
Will Series 11 get Readiness?
Not Apple's. Series 11 is the watch this question stings on, because it was the flagship a week ago. It already tracks HRV, resting heart rate, sleep, wrist temperature and training load. watchOS 27 will still land on it. The missing piece is the new optical stack that samples heart rate every five seconds and HRV every five minutes. Apple built Readiness on that stream, so the app is not on the Series 11 page.
If you keep the Series 11 on your wrist overnight, Fitcoin already has the inputs. You are missing Apple's all-day refresh, not a morning call. AFib History is how you add daytime density on this watch if you want it.
Series 10 and Series 9
Same story, one or two generations back. Both run watchOS 27. Neither is named with Apple Readiness. Both still write sleeping HRV and resting heart rate to Health. Fitcoin already scores them. The difference versus Series 11 is mostly how new the watch feels, not whether the morning number can run.
If you have been comparing a ring or a strap, Oura vs Apple Watch and Whoop vs Apple Watch are the longer versions. The short one: Fitcoin already turns last night into a number on these watches. You do not need new hardware for that.
Apple Watch Ultra 3 and Ultra 2
This is the Ultra version of the Series 11 sting. Ultra 3 was the flagship last year. It gets watchOS 27. It does not get Apple Readiness. Ultra 2 is the same split: new software, no 0-10 tile. Apple tied the score to the Health Sensing System on Ultra 4, not to the Ultra name.
Both watches already do the overnight job. HRV, resting heart rate, sleep, wrist temperature and training load still land in Apple Health. Sleep in the Ultra you already own and Fitcoin Recovery runs tomorrow morning. What you are missing is Apple's all-day HRV cadence and the native wrist tile, not a push-or-easy call. AFib History is the optional extra if you want that daytime density on Ultra 3 or Ultra 2.
If the only reason you are looking at Ultra 4 is Readiness, I would wait. Ultra 4 is the upgrade if battery, maps and long efforts were already on the list. The score is a bonus on that watch, not a reason to replace a healthy Ultra 3.
Apple Watch Ultra 1
Ultra 1 does not get watchOS 27. It also does not get Apple Readiness. That is the same bucket as Series 8 and Series 7. The first Ultra still writes overnight HRV and sleep. It has been doing that since 2022. None of that vanishes because Ultra 4 exists.
Wear it to bed. Fitcoin still scores last night. You will not get five-minute daytime HRV or Apple's 0-10 labels. AFib History is how Ultra 1 gets a denser day if you want one.
Apple Watch SE 3 and SE 2
SE 3 gets watchOS 27 and does not get Readiness. SE 2 gets neither. Both still record overnight HRV and sleep if you wear them at night. The SE was never sold as a readiness watch. It still writes the samples a readiness score needs.
If you bought SE 3 last year and you are staring at the Series 12 page, you do not need to upgrade for a morning score. Put Fitcoin on the phone. Wear the SE overnight. That is the score.
Series 8, Series 7 and older
These watches do not get watchOS 27. They also do not get Apple Readiness. That sounds worse than it is. A Series 8 or Series 7 has been writing overnight HRV and sleep for years. Wrist temperature starts at Series 8. None of that disappears because a newer OS exists.
What you will not get is Apple's daytime HRV cadence, Health Age in the redesigned Health app (that needs a current Watch and an Apple Intelligence iPhone later this year), or any promise that Apple will backport the 0-10 score. Fitcoin still does the morning job if the watch lasts the night. For the maths behind the samples, HRV on Apple Watch explained is the quieter page.
How to get Fitcoin readiness on the watch you have
Wear it to bed. That is the unglamorous bit. Overnight HRV and resting heart rate are the samples Recovery uses. A lunchtime Breathe session is a different job and should not be mixed into yesterday's average. Best HRV apps for Apple Watch goes into that split.
Download Fitcoin, connect Apple Health, sleep in the watch. Recovery is the morning readiness stamp. Energy is the tank. That runs on every model above. Athlytic, Bevel and Gentler Streak also live in those threads. I split morning readiness from the daytime tank because a single 0-10 that tries to be both always felt coarse. That is taste, not a law. The comparison is in recovery scores explained and the recovery apps without Whoop list.
If what you wanted was a tank that drains after a session, that is a different question from readiness. Garmin calls it Body Battery. The Watch version of that idea is in Does Apple Watch have Body Battery?
AFib History HRV: the workaround that actually works
This is the search. How do I get more HRV readings on an older Apple Watch? Does AFib History increase HRV? Does it make Fitcoin more accurate?
Yes. It works, and it is optional. Fitcoin already scores every Series 4 and later Watch from overnight HRV. AFib History is how you get more samples after you wake up, which tightens Energy, the live readiness nudge and Stress. On Series 12 and Ultra 4, HRV through the day is already a hardware graph. On Series 11, Ultra 3 and earlier, Health usually has a handful of overnight points and not much else unless this switch is on. We cannot invent samples the watch did not take.
AFib History (AF History in the UK Health app) is the setting. When it is on, Apple Watch Series 4 and later collect pulse-rhythm data much more often. Those extra tachograms land in Apple Health as heart rate variability. Developers have been saying this since watchOS 9. I have seen the same thing in HealthKit: a sparse overnight scatter becomes a through-the-day line. Bevel and Athlytic read it too. Fitcoin is the one I ship, so that is the one I care about here.
It is still Apple's AFib History feature. Apple built it for people 22 and over who are tracking atrial fibrillation, and the setup flow asks you to confirm a doctor diagnosis. Irregular rhythm notifications turn off, because Apple does not intend that alert for people already in AFib. Low Power Mode also quiets the extra samples. Answer the Health screens as they apply to you. I am not going to tell you to invent a diagnosis on a medical prompt. I am going to say the sampling side is real: once the feature is on, more HRV is written, and every Health-reading readiness app can use it.
How to turn on AFib History for more HRV
- On iPhone, open the Health app.
- Tap Browse or Search, then Heart.
- Tap AFib History (US) or AF History (UK).
- Tap Set Up, then Get Started. Enter your date of birth and finish Apple's questions.
- Keep Heart Rate and Wrist Detection on. Wear the watch, including overnight. Leave Low Power Mode off if you want the extra samples.
The next day, open Health, Heart, Heart Rate Variability. You should see more timestamps than a normal older-watch night. Fitcoin picks those points up on the next sync. You do not grant us a special AFib permission. We already read HRV. Bevel and Athlytic will too if you use them.
Works on Series 4 and later, including Series 7 to 11, SE 2, SE 3, and Ultra 1, 2 and 3. Series 12 and Ultra 4 do not need this for density. They already write HRV about every five minutes. Overnight Recovery still uses last night either way. Apple's own setup page is Track your AFib History with Apple Watch.
If you never turn it on, Fitcoin still gives you a morning score from sleep HRV. The daytime graph will just look like an older Watch graph: a few night points, then a gap. That is the watch, not us.
What you are missing if you stay on the older watch
It is worth being specific, so this does not sound like cope.
- Apple's own 0-10 tile and the four labels on the wrist, with no third-party app.
- HRV about every five minutes, plus Apple's Recovery HRV split. That is the real hardware jump. It should make any Health-reading app, including ours, a bit more alive during the day once watchOS 27 is out and we can see what lands in HealthKit.
- Heart rate every five seconds all day, which is a workout story as much as a readiness story.
What you are not missing is overnight HRV, Sleep Score, Vitals or Training Load. Those stay on Series 9 to 11, SE 3, Ultra 3 and Ultra 2 with watchOS 27, and the older models already had the overnight half. For most people asking "will readiness work with my Series 10" or "will Ultra 3 get Readiness", that is the useful distinction.
Should you upgrade for this?
If the only reason is a readiness number, I would not. Fitcoin already gives you that call from the watch you paid for last year, or the year before. Wait for independent tests of the new sensors if the five-minute HRV is what you actually want.
If you were upgrading anyway, Series 12 is the one that includes Apple's score. Ultra 4 is the one if battery and long efforts were already the reason. Readiness is a bonus on those two, not the whole pitch, and it is not a reason to retire a working Ultra 3 or Series 11.
Frequently asked questions
Does Fitcoin do readiness on every Apple Watch?
Yes. Series 12, Ultra 4, Series 11 to 7, SE 3, SE 2, Ultra 3, Ultra 2 and Ultra 1. If the watch writes overnight HRV and sleep to Apple Health, Fitcoin Recovery scores the morning. AFib History is optional and makes the daytime half more accurate.
Will Apple Watch Series 11 get Readiness?
Not from Apple. Series 11 runs watchOS 27. Apple has only listed the Readiness app on Series 12 and Ultra 4. Fitcoin already scores Series 11 from last night.
Will Apple Watch Ultra 3 get Readiness?
Not Apple's. Ultra 3 gets watchOS 27. It does not get the 0-10 app. Fitcoin readiness already runs on Ultra 3, Ultra 2 and Ultra 1.
What about Ultra 2 or Ultra 1?
Ultra 2 gets the OS update and not Apple's score. Ultra 1 gets neither. Fitcoin still scores both. Wear it to bed.
Does Series 10, Series 9 or SE 3 get Readiness with watchOS 27?
Not Apple's. They get the OS update. They do not get the 0-10 app. Fitcoin already uses the same overnight data. SE 2 is with Series 8: no new OS, still Fitcoin readiness.
What about Series 8 or Series 7?
No watchOS 27, and no Apple Readiness. Overnight HRV is still there. Fitcoin still scores the morning.
How do I get more HRV readings on an older watch?
Turn on AFib History in Health (Browse or Search, Heart, AFib History or AF History). It works. Series 4 and later then write extra HRV through the day, and Fitcoin Energy, readiness and Stress get more accurate. Sleep in the watch either way. That is still the overnight Recovery sample.
Does AFib History increase HRV on Apple Watch?
Yes. Once it is on, you get far more HRV timestamps in Health than a normal older-watch night, often around hourly when you are still. That is the whole point of the workaround.
Does AFib History make Fitcoin more accurate?
Yes. More daytime HRV means Energy, the live readiness nudge and Stress have more to work with. Recovery still uses last night if you never turn it on. Bevel and Athlytic see the same extra Health samples.
Is Apple Readiness the same as Whoop Recovery?
Similar ingredients, different shape. Whoop is a morning percentage that stays put. Apple's is 0-10 and can move during the day. The longer comparison is in the Series 12 Readiness piece.
Method: Written 13 September 2026 from Apple's 9 September 2026 Newsroom releases for Series 12, Ultra 4 and the health update, Apple's published watchOS 27 compatibility (Series 9 and later, SE 3, Ultra 2 and later), and Apple's AFib History documentation (Series 4 or later, intended for people tracking atrial fibrillation). Third-party app names reflect public listings at publication. Fitcoin details reflect the current app. Wellness estimates only, not medical advice. Fitcoin has no commercial relationship with Apple.
Related reading: Series 12 Readiness score, Does Apple Watch have a readiness score?, HRV on Apple Watch, recovery apps without Whoop.
About the author: Harris Khan is the co-founder and CTO of Fitcoin, a UK fitness-rewards app.