COROS PACE 4 Review: Lightweight, Accurate and Now Much Better With Maps

The COROS PACE 4 combines an ultralight design, AMOLED display, excellent GPS accuracy and serious battery life — and a September 2026 update fixes one of its biggest original weaknesses by adding offline maps.

The PACE 4 weighs only 32g with the nylon strap and 40g with silicone, while measuring 11.8mm thick. That’s particularly useful for runners because a light watch moves around less during faster sessions and is also easier to tolerate while sleeping.

Tom’s Guide reached a similar conclusion after six months and more than 1,500 miles of use, calling out the comfort of the lightweight design and reporting no major scratching or marking during its long-term testing.

The standard model does look fairly simple, though. It’s primarily built around lightweight polymer rather than the metal and sapphire construction you’ll find on more expensive outdoor watches.

COROS now offers Black Crystal and Cloud White aluminum-bezel versions if you want something a little more premium, although the price rises to C$399.

The AMOLED Display Is the Big PACE 3 Upgrade

The switch to a 1.2-inch AMOLED touchscreen is probably the most immediately noticeable improvement over the PACE 3. COROS says resolution is 164% higher than the previous generation, while automatic brightness adjusts the screen according to surrounding light.

Independent testing backs up the usability side of that claim. Tom’s Guide found the display bright enough across different conditions and described the interface as responsive using either touch or physical controls.

For people moving from something like the PACE 3, this is the upgrade you’re going to notice every time you look at the watch.

GPS Accuracy Is One of Its Strongest Areas

PACE 4 supports both All-Systems GNSS and dual-frequency positioning, using GPS, GLONASS, Galileo, BeiDou and QZSS.

Tom’s Guide compared it extensively against the Garmin Forerunner 970 during six months of training and found its tracks consistently reliable. During the Paris Half Marathon, the watch recorded 21.13km against the official 21.1km race distance. Wareable also found the dual-band GPS dependable during testing.

For runners who primarily want accurate pace, distance and workout tracking, there’s very little to complain about here.

Heart Rate: Good for Running, Less Certain Elsewhere

Heart-rate performance is slightly more complicated. COROS redesigned the optical sensor with larger LEDs and says the new arrangement helps reduce spikes and dropped readings.

Tom’s Guide had strong results during running, including long-term testing and races, with readings generally behaving as expected compared with chest-strap data. Wareable found something similar while running but saw a bigger miss during a hard indoor cycling session, where the PACE 4 recorded a peak of 155bpm while the reference measurement was in the high 170s.

That difference matters for normal running and general fitness tracking, the sensor appears quite capable. For intervals, cycling, strength work or activities involving lots of wrist movement, a chest strap remains the better option if heart-rate accuracy matters to your training.

At the time of writing, the feature is officially in beta. That’s a pretty big deal because navigation was previously one of the strongest reasons to spend more on the PACE Pro.

There is a catch: the PACE 4 has just 4GB of internal storage, and maps have to share that capacity with music and system data.

Still, for a watch at this price, having proper geographical context instead of simply following a breadcrumb line substantially improves its usefulness for trails and unfamiliar routes.

Battery Life Is Excellent for an AMOLED Watch

COROS rates the PACE 4 for:

• 19 days of normal daily use
• 6 days with Always-On Display
• 41 hours using All-Systems GPS
• 31 hours using dual-frequency GPS

Real-world results naturally fall below the headline daily-use figure once you’re actually exercising.

During long-term testing, Tom’s Guide reported roughly five days per charge while using Always-On Display and recording outdoor runs every day in dual-band GPS mode. Turning Always-On Display off increased that to around a week.

That’s still excellent for such a small AMOLED watch.

There have been some reddit reports of increased battery drain following particular firmware updates, so software versions can affect real-world results. Those community reports shouldn’t be treated as evidence that every watch has the issue, but they’re worth keeping an eye on.

Dear Coros, Fix my battery
by u/ViRuS1123 in Coros

COROS Gives Runners Plenty to Work With

The PACE 4 isn’t trying to compete with an Apple Watch on apps.

Instead, COROS spends most of its effort on training.

You get tools including:

• Running Fitness
• Race Predictor
• Weekly training load
• Recovery estimates
• Virtual Pacer
• Structured workouts
• Personalized marathon plans
• Sleep tracking
• HRV
• Pace Strategy
• Hill Alerts
• Live Tracking
• Cycling Climb Alerts

COROS has also continued adding features throughout 2026 rather than leaving the hardware frozen at launch. That long-term software support may end up being one of the PACE 4’s more valuable qualities.

The Smartwatch Side Is Still Basic

If you’re coming from Apple, Samsung or even Garmin, this is where expectations need adjusting. You can receive notifications, control media playing on your phone and store MP3 files directly on the watch.

But there is no direct Spotify or Apple Music integration, and you don’t get NFC contactless payments.

There’s also a built-in microphone, but COROS mainly uses it for Voice Pins, training notes and voice functions rather than turning the watch into a full wrist-based communications device. Think running computer first, smartwatch second.

COROS PACE 4 vs PACE 3 vs PACE Pro

The pricing makes this particularly interesting. The PACE 3 is C$299, while the PACE 4 costs C$349. For C$50 more, you’re getting AMOLED, the redesigned HR sensor, substantially better All-Systems GPS battery life, the microphone and now mapping.

That makes the PACE 3 harder to recommend unless saving every dollar matters or you specifically prefer its always-on transflective display.

The PACE Pro sits at C$429. It gives you a larger 1.3-inch AMOLED display, faster processor and a slightly more substantial design, but its quoted All-Systems GPS battery is actually 38 hours versus 41 on the PACE 4.

Now that the PACE 4 has maps, the value gap between the two has become considerably smaller.

What About the Garmin Forerunner 165?

Garmin remains the more smartwatch-like ecosystem.

The Forerunner 165 brings Garmin Pay, deeper wellness tools and Garmin’s broader software ecosystem, while the Music version can work with supported third-party music services.

But the PACE 4 counters with dual-frequency GPS, far stronger quoted GPS battery life and offline maps.

Garmin rates the Forerunner 165 at up to 17 hours using All-Systems GNSS, compared with the COROS’s 41 hours in All-Systems mode.

So the decision is largely about priorities: Garmin offers the richer everyday ecosystem; COROS pushes harder on battery, navigation and straightforward endurance training.

Related Review: Garmin Forerunner 165 Review (2026): Still Worth Buying After the Forerunner 170?

Should You Buy the COROS PACE 4?

For a runner, triathlete or cyclist who wants a lightweight watch and cares primarily about GPS, structured training, navigation and battery life, the PACE 4 makes a very strong case at C$349.

The September 2026 mapping update is especially important. At launch, the missing maps were one of the clearest arguments for buying the more expensive PACE Pro. That distinction is much less meaningful now.

Skip it if smartwatch apps, mobile payments, streaming music or broader lifestyle features matter as much as your workouts.