Apple just made a big announcement about the new Apple Watch Ultra 4.

A new Health Sensing System. Higher-frequency heart rate and HRV measurements. A new Readiness score. More advanced health insights.

And yes, the Apple Watch Ultra 4 is a serious piece of wearable technology.

But there is a question worth asking before spending $799 on one:

How much of what Apple is calling “new” is actually new?

For health and recovery tracking, the answer may be less impressive than the launch presentation makes it sound.

The CIRCUL RING 2 MAX has already been built around a different philosophy: continuous physiological monitoring, long-term recovery insights, and a wearable designed to stay on your body day and night.

Apple Watch Ultra 4 starts at $799 in the U.S. CIRCUL RING 2 MAX has an official list price of $269 as of the August 2026 pricing snapshot, with current pricing subject to change on the official website.
So the real question isn't simply:

Apple Watch Ultra 4 or CIRCUL RING 2 MAX?

It is:

Are you paying for capabilities you actually need—or paying for the Apple logo around capabilities a smart ring has already been doing?

Apple Watch Ultra 4 vs. CIRCUL RING 2 MAX: At a Glance

Compare the CIRCUL RING 2 MAX and Apple Watch Ultra 4 for health tracking.

*CIRCUL RING 2 MAX official list price based on the August 2026 pricing snapshot; check the official website for the current price. Apple Watch Ultra 4 starts at $799 in the U.S. And that price gap matters.

You are looking at roughly three times the starting price for the Apple Watch Ultra 4.

The question is what you get for those extra dollars.

Key Takeaways

• CIRCUL RING 2 MAX delivers true 24/7 continuous HR and HRV monitoring, with data updating every second, rather than relying on periodic spot checks.

• Apple Watch Ultra 4 now measures background heart rate every five seconds, compared with every five minutes on the previous Ultra 3. Apple describes this as a 60× increase in background heart rate reading frequency.

• For heart rate, CIRCUL RING 2 MAX’s one-second monitoring is 300× more frequent than the five-minute background heart rate readings of the previous Apple Watch Ultra 3. Apple’s own Ultra 4 upgrade increases that frequency by only 60×, from five minutes to five seconds.

• Apple’s new Readiness score has a familiar counterpart in CIRCUL: CIRCUL’s Body Energy has long been designed to turn HR, HRV, sleep, temperature, and related signals into an easy-to-understand view of your body's current state.

• The biggest difference is not simply the number of health features. Apple Watch Ultra 4 is built as a feature-rich smartwatch for sport, communication, and everyday use, while CIRCUL RING 2 MAX is focused on continuous health and wellness tracking in a lightweight ring form.

• If your priority is continuous health data, sleep, recovery insights, adaptive fit, and long battery life without a subscription, CIRCUL RING 2 MAX offers a different value proposition from buying another premium smartwatch.

• New does not always mean first. Some of the health-tracking concepts Apple is introducing or expanding in Ultra 4 are capabilities CIRCUL has already been building around for years.

Which Device Should You Pick?

1. Apple Increased Heart Rate Sampling. CIRCUL Was Already Continuous.

Apple says the new Apple Watch Ultra 4 now measures background heart rate every five seconds, all day long. Apple describes this as a major improvement enabled by its new Health Sensing System. Apple also states that this is 60× more frequent than the background heart rate readings on Apple Watch Ultra 3. That's a meaningful improvement.

But now compare the same starting point with CIRCUL.

The CIRCUL RING 2 MAX is built around true 24/7 continuous monitoring of HR, HRV, and Body Energy, with data updates every second.

The math is straightforward:

Apple Watch Ultra 3: approximately every 5 minutes

5 minutes = 300 seconds

CIRCUL RING 2 MAX: every 1 second

300 seconds ÷ 1 second = 300

So if you compare one-second continuous monitoring with a five-minute sampling interval, the difference in sampling interval is:

300×

This does not mean CIRCUL RING 2 MAX is “300× more accurate.”

It means the heart-rate monitoring interval is substantially more frequent when you compare CIRCUL's one-second monitoring with the previous Apple Watch Ultra's five-minute background reading interval.

Apple has made higher-frequency heart rate sensing a major feature of Ultra 4.

CIRCUL's approach was already built around continuous monitoring.

2. And Here's the More Important Part: HRV

Heart rate and HRV are not the same thing: Heart rate tells you how fast the heart is beating. HRV looks at variation between successive beats and can provide useful context around autonomic regulation, stress, and recovery-related patterns.

And this is where the numbers need to be kept separate - Apple Watch Ultra 4 measures HRV as often as every five minutes, and describes this as 24× more frequent than Ultra 3.

CIRCUL RING 2 MAX takes a different approach. Its official product positioning describes true 24/7 continuous HRV monitoring, with data updated every second.

So there are actually two different Apple comparisons happening here:

Heart Rate

Ultra 3 → Ultra 4: 5 minutes → 5 seconds = 60×

Ultra 3 → CIRCUL: 5 minutes → 1 second = 300×

HRV

Ultra 3 → Ultra 4: Apple says 24× more frequent

CIRCUL: true 24/7 continuous HRV monitoring

The point isn't that more data automatically means a better health decision, is that continuous data reduces the gaps between observations. And that's precisely where CIRCUL has been focusing for years.

3. The “New” Readiness Score? CIRCUL Already Had Body Energy.

This is probably the most interesting part of the comparison.

Apple Watch Ultra 4 introduces Readiness, a new feature that analyzes activity, training load, vitals, and sleep data and turns them into a daily 0–10 score with recommendations such as “Recover,” “Pace Yourself,” “Ready,” or “Go For It.” Apple says the feature updates throughout the day as new data comes in.

It's a useful concept, but it isn't a new category.

CIRCUL RING 2 MAX already has Body Energy Score, and CIRCUL's Body Energy isn't simply a repackaged step count or workout score. It is built around the ring's continuous monitoring of physiological signals, combining information such as:

• Heart rate

• HRV

• Temperature

• Sleep

• Daily physiological patterns

CIRCUL describes Body Energy as a way to understand what is draining or restoring your body's energy through its continuous monitoring system.

So while Apple is introducing: “Here is your readiness for today.” CIRCUL has already been asking: “What is happening to your body's energy throughout the day?”

That's an important difference in philosophy.

4. A New Score Doesn't Automatically Mean a New Idea

Wearable companies increasingly turn complicated physiological data into a single number because most people don't want to interpret hundreds of biometric measurements every morning, which is a good user-experience decision, but the score itself isn't the innovation.

The quality and continuity of the underlying data matter.

A readiness score based on sparse measurements is still ultimately dependent on those measurements. A score built from denser physiological data has a different foundation.

This is why CIRCUL's true 24/7 continuous monitoring matters: The value isn't simply seeing a number labeled “Body Energy”, it is the continuous data behind it.

5. The Difference Between a Watch and a Health Ring

Of course, Apple Watch Ultra 4 does something CIRCUL RING 2 MAX does not.

As a full smartwatch, you can get:

• GPS

• Cellular connectivity

• Satellite communication

• Large display

• Apps

• Navigation

• Advanced workout features

• Safety features

• ECG

• Adventure-oriented functions

Apple positions the Ultra 4 explicitly around sports, adventure, fitness, health, and safety. If you want a computer on your wrist that can guide a run, navigate a trail, communicate without your phone, and function as an outdoor adventure device, the Ultra 4 has a very different value proposition.

CIRCUL isn't trying to be that. And that's exactly why comparing these two devices only by the number of features misses the point.

CIRCUL is built around a different question: How much useful physiological information can you collect while the device simply stays on your body?

6. For Continuous Health Tracking, Form Factor Matters

A health wearable can only collect data when you actually wear it.

That sounds obvious, but it is one of the most overlooked variables in wearable health tracking.

A large smartwatch can be extremely useful during a workout, however, while sleep time is different. Because you need to wear the device for hours without thinking about it, to keep wearing it when you're working, relaxing or when you're asleep, and that's where a ring has a fundamental advantage.

The CIRCUL RING 2 MAX uses an Adaptive Sizing Structure designed to accommodate natural changes in finger size while maintaining a comfortable fit.

The design isn't simply about comfort, stable positioning also matters for optical sensing. A ring that remains comfortably positioned on the finger provides a more consistent environment for long-term physiological monitoring.

7. Battery Life: The Data You Don't Collect Doesn't Exist

Apple Watch Ultra 4 has improved battery life, it can reach up to 50 hours of normal use, with up to 84 hours in Low Power Mode.

However, CIRCUL RING 2 MAX takes a different approach. It is designed for up to 7 days of battery life, including its true continuous monitoring mode, which matters specifically for health tracking. Because every time you remove a wearable to charge it, you create a potential gap in your data.

The simpler the wearable is to keep on, the easier it becomes to build a consistent long-term baseline, that's the whole point of true 24/7 continuous monitoring.

8. Sleep Is Where the Ring Form Factor Really Makes Sense

Sleep is one of the most important parts of any recovery picture. It is also one of the situations where wearing a large smartwatch may be less appealing.

CIRCUL RING 2 MAX is designed to stay on the finger overnight and provides:

• Sleep stages

• Sleep Debt

• Sleep Recovery Assessment

• Nighttime continuous SpO₂ monitoring

• Sleep Apnea Risk Assessment

It provides nighttime continuous SpO₂ monitoring, and sleep-related feature: Sleep Apnea Risk Assessment, these features give you real insight into your breathing while you sleep.

A sleep recovery index adds another layer. This score combines your sleep stages, heart rate, and HRV data. It tells you how well your body recovered overnight. You wake up knowing whether you are ready to push hard or need an easier day. The Apple Watch Ultra 4 tracks sleep too. But it requires nightly charging. Its wrist-worn form may feel less comfortable for some sleepers.

9. The $799 Question

Apple Watch Ultra 4 starts at: $799, CIRCUL RING 2 MAX official list price: $269. That's a $530 difference. Or put another way: Apple Watch Ultra 4 costs about 3× as much as the CIRCUL RING 2 MAX at the respective U.S. starting/list prices.

And what are you actually buying?

If you're buying the Apple Watch for GPS, cellular, satellite communication, a large display, advanced workout features, safety functions, and the broader Apple ecosystem, the additional hardware has a clear purpose.

But if the main reason you're shopping is: “I want better insight into my sleep, recovery, HRV, heart rate, and daily energy.” Then the comparison becomes much less straightforward.

Because CIRCUL RING 2 MAX already provides:

• True 24/7 continuous HR & HRV monitoring

• Body Energy Score

• Sleep tracking

• Nighttime continuous SpO₂ monitoring

• Blood pressure monitoring

• Adaptive fit

• Up to 7-day battery life

• No subscription

And it does that at a fraction of the Ultra 4's starting price, even also very

10. What Apple Does Better—and What CIRCUL Does Differently

A fair comparison should acknowledge the strengths of both devices.

This isn't a case where one device replaces the other in every situation. It is a question of what you're actually paying for.

11. The Bigger Question: Do You Need Another Smartwatch?

Apple's latest launch makes an interesting point about the wearable market.

Every year, new hardware gets more powerful. But health tracking doesn't necessarily become better simply because a device can do more things.

Sometimes the better health wearable is the one you forget you're wearing: The one that stays on overnight, doesn't need to be removed every day, and which keeps collecting data while you're working, sleeping, exercising, relaxing, and doing absolutely nothing. That is the philosophy behind CIRCUL.

The Bottom Line

Don't buy the Apple Watch Ultra 4 simply because Apple just announced features you've been looking for.

First ask what you actually need.

If you want a rugged smartwatch that happens to have advanced health features, the Apple Watch Ultra 4 is built for that job.

If you want a wearable dedicated to continuous health and recovery insights, the CIRCUL RING 2 MAX deserves a much closer look.

Because sometimes the smarter purchase isn't the newest device.

It's the device that was already doing what you needed.

Wellness Disclaimer

CIRCUL RING provides wellness and lifestyle insights and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Health measurements and insights should not replace professional medical advice, diagnosis, or treatment.