ApplevsCoros
Apple Watch Ultra 3 vs Coros Pace 4: comparison
Apple Watch Ultra 3 vs Coros Pace 4 using the data from our reviews: score, who each one is for, and their strengths and weaknesses.
Summary of both reviews
| Apple Watch Ultra 3 | Coros Pace 4 | |
|---|---|---|
| Our score | 82/100 | 80/100 |
| Who it is for | iPhone users who train outdoors and want a watch with accurate GPS, ECG and health alerts with FDA clearance, with no monthly fee and no need for more than two days of battery. | Runners and endurance athletes who want a light AMOLED watch with HRV, sleep tracking and weeks of battery, with no monthly fee and no closed ecosystem. |
| Skip it if | You do not have an iPhone, you do ultras or multi-day outings without charging, or you want a daily recovery score (none was found in Apple's documentation for this model). | You want a smartwatch with apps, payments and phone features, or you need ECG and skin temperature to keep an eye on your recovery. |
| Check price | Check price on Amazon | Check price on Amazon |
Each score comes from its full review, with its sources and criteria. The two scores are only comparable within the same type of product.
Apple Watch Ultra 3
Pros
- • Very accurate GPS in one specialist outlet test (exactly 2.0 miles on a 2-mile reference loop) and heart rate within ±1 bpm of a Polar H10 chest strap on average.
- • ECG, hypertension alert and apnea alert with FDA clearance (Apple lists them as available in Spain, although it does not detail which clearance supports them in the EU); the ECG also has a clinical trial from Apple (98.3% sensitivity for atrial fibrillation and 99.6% specificity in sinus rhythm, in classifiable readings).
- • No mandatory fee: data and health features are viewed in the iPhone Health app.
Cons
- • Short battery for an adventure watch: Apple states 42 hours and a specialist outlet measured 16 hours of continuous GPS.
- • Works only with iPhone, and the sleep, HRV and temperature features have no published validation for this model.
- • It is the previous generation: the Ultra 4 is already on sale with a higher stated battery life and renewed sensors.
Coros Pace 4
Pros
- • Stated battery life of up to 19 days of daily use and 41 hours of GPS, at only 32 g with the nylon strap.
- • Records HRV, sleep stages and resting heart rate, with a recovery and training app and no fee mentioned on the product page.
- • Dual-frequency GPS and a 1.2-inch AMOLED touchscreen.
Cons
- • No independent validation found for sleep or HRV; wrist heart rate accuracy varies with effort.
- • No ECG or skin temperature, and SpO2 confirmed only by third-party sources.
- • No ANT+, no payments or third-party apps, and no full offline mapping according to reviews.
Apple Watch Ultra 3
What the Apple Watch Ultra 3 measures, which health features have FDA clearance, how long its battery really lasts and who it suits compared with the Ultra 4.
Coros Pace 4
What the Coros Pace 4 measures, how long its battery lasts, what it lacks next to the Pace 4 Pro and who it suits as a running and recovery watch.