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The Ultimate Watch for Mountain Sports
COROS APEX 4 - premium GPS watch with a lightweight and durable titanium bezel around the display and sapphire glass. Available in two sizes 46 mm and 42 mm with battery life up to 65 hours in GPS mode. New third button Action key, dual microphone with noise cancellation, speaker for audio alerts during activities and hands-free calls when connected to phone, as well as the ability to store up to 5 locations for weather tracking directly on the watch. Third generation MIP touchscreen display with improved contrast and excellent readability in sunlight. The display is continuously on 24/7 thanks to low power consumption.


COROS APEX 4 Sizes - 46 mm and 42 mm
Two Sizes for Everyone
COROS APEX 4 is available in two sizes - 46 mm and 42 mm, with the larger version suitable for men's wrists and the smaller version for women or people with smaller wrists. The 46 mm diameter version offers a larger display with higher resolution — data and maps are more readable and clearer. The 42 mm diameter variant is more discreet, its compact dimensions emphasize delicacy and elegance and better complement a more delicate women's wrist.

COROS APEX 4 46 mm
display bezel material and display glass
display resolution
weight with nylon strap
COROS APEX 4 42 mm
display bezel material and display glass
display resolution
weight with nylon strap
Battery Life Up to 65 Hours in GPS Mode
Long Activities Without Charging
COROS APEX 4 with 46 mm diameter achieves battery life up to 65 hours in Endurance GPS mode. The watch offers three adjustable GPS modes during activity — Max GPS Mode maximizes accuracy, Endurance GPS Mode extends battery life and High GPS Mode is a balanced compromise suitable for most situations. Both versions handle normal sports life including long endurance activities without problems.


COROS APEX 4 46 mm
recommended High GPS Mode
economical Endurance GPS Mode
most accurate Max GPS Mode
COROS APEX 4 42 mm
recommended High GPS Mode
economical Endurance GPS Mode
most accurate Max GPS Mode

Voice Notes and Audio Features APEX 4
Record Moments and Receive Alerts
Voice Pins feature allows recording voice notes during activity by pressing a button (for example the new Action key). The note is automatically saved to the exact route point and can be played back later directly in the activity record. Audio Playback feature announces current data through the speaker including distance, pace and average heart rate. The watch also allows receiving hands-free calls when connected to a phone.

COROS APEX 4 Dual Microphone
Dual microphone with noise cancellation is available for recording voice notes directly during activity.
COROS APEX 4 Audio Playback
Built-in speaker announces data like distance and pace and the watch allows hands-free calls when connected to phone.
Titanium Construction and Premium Materials
Beauty and Robustness Together
Premium design combines elegance with durability for demanding mountain conditions. Sapphire glass and titanium bezel, which slightly protrudes beyond the display edge, together protect the watch from impacts and scratches. Strap attachments to watch body are also reinforced. Steel rotating crown and larger buttons including the new third Action key button improve control and user comfort. COROS APEX 4 embodies a rare balance between civility and ruggedness — premium materials and thoughtful design create a product that is equally elegant and robust.


COROS APEX 4 24/7
Continuously - even during activity - on display with excellent readability even in direct sunlight.
COROS APEX 4 MIP
New third generation Memory-in-Pixel display with even better contrast and deep black color.
GPS Navigation with Offline Maps
Clear Navigation on Your Wrist
Navigation with COROS APEX 4 always gets you to your destination — or back to the start. Use Back-to-Start navigation, track turns in real time with Turn-by-Turn navigation and mark places on route using Pins. New and clear maps now display street and trail names, highlight differences between roads and trails and Points of Interest are also displayed on the map. And the maps are of course free.


COROS APEX 4 Detailed Maps
Maps now display street and area names and distinguish between roads and trails.
COROS APEX 4 Points of Interest
Free maps also display Points of Interest for better orientation.
Additional Features COROS APEX 4
Also Found in the Watch
-
COROS APEX 4 Enhanced Dual-Range Barometer
For even more accurate measurement of altitude and elevation. Plus sensor for measuring depth in water.
-
COROS APEX 4 Powerful Chip
New powerful chip ensures up to 30 times faster loading and rendering of maps as well as graphics display compared to APEX 2 model.
-
COROS APEX 4 SpO2 Sensor
New SpO2 sensor for measuring blood oxygen saturation.
-
COROS APEX 4 32 GB Storage Space
32 GB storage space for maps, routes or music.
-
COROS APEX 4 Memory-In-Pixel Display
While the entire outdoor segment is transitioning to bright AMOLED displays, COROS stays with the proven Memory-In-Pixel (MIP) display technology for APEX 4. The improved third generation offers even better contrast and deep black color. The reason? COROS targets real needs of the sports community, not trends. The MIP display is continuously on — during normal use and during sports activities, 24 hours a day, 7 days a week. You don't have to lift your wrist for data to appear on the display. The watch serves you, not the other way around. Another advantage: the more the sun shines, the more readable the display — the exact opposite of AMOLED displays. And energy efficiency? COROS APEX 4 (46 mm) lasts up to 24 days during normal use — almost a whole month without charging. If you still long for an AMOLED display, there's the PACE Pro model.
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COROS APEX 4 7-Day Training Load
Track your 7-day training load together with Base Fitness and Training Load metrics. Instead of a fixed interval from Sunday to Sunday, a rolling overview of the last 7 days (rolling 7-day) is now displayed.
-
COROS APEX 4 Photos and Videos on Route
Record photos and videos that are automatically assigned to your route by GPS. You'll see where they were captured and can easily plan your next adventures.
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COROS APEX 4 3D Virtual Flyover
Experience your adventure again in 3D view — with virtual flyover over the route, including saved photos and videos from the route, voice notes.
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COROS APEX 4 Experience Sharing
Simply create a link to share your experience — with photos, statistics and saved points so others can enjoy the adventure too. New sharing options let you select specific training data and present it using professional templates.

COROS APEX 4 Technical Specifications
Product Parameters
Dimensions and Weight | |
Physical Dimensions |
46 mm
46.2 × 46.2 × 15.5 mm
(height does not include heart rate sensor protruding from back)
42 mm
42.6 × 42.6 × 15.8 mm
(height does not include heart rate sensor protruding from back)
|
Weight with Silicone Strap |
46 mm
64 g
42 mm
56 g
|
Weight with Nylon Strap |
46 mm
52 g
42 mm
45 g
|
Display | |
Display Diameter |
46 mm
33.02 mm – 1.3 inch
42 mm
30.48 mm – 1.2 inch
|
Display Resolution |
46 mm
260 × 260 px
42 mm
240 × 240 px
|
Display Type | third generation Always-On Memory-in-Pixel touchscreen LCD display |
Materials | |
Display Bezel Material | Grade 5 titanium |
Display Glass Material | sapphire |
Watch Body Material | reinforced polymer |
Strap | |
Width |
46 mm
24 mm
42 mm
22 mm
|
Type | Quick Release strap | Wireless Connection |
Connection to Smartphones | Bluetooth, Wi-Fi |
Connection to Accessories | Bluetooth |
Battery Life | |
Normal Use daily sleep measurement, stress score and HRV |
46 mm
up to 24 days
42 mm
up to 15 days
|
High GPS Mode balanced compromise for most situations |
46 mm
up to 53 hours
42 mm
up to 34 hours
|
Endurance GPS Mode maximum battery life |
46 mm
up to 65 hours
42 mm
up to 41 hours
|
Max GPS Mode maximum accuracy |
46 mm
up to 41 hours
42 mm
up to 26 hours
|
Warning | Using microphone and especially speaker for hands-free calls has significant impact on battery life. |
Navigation | |
Satellite Systems |
|
Features |
|
Offline Maps | yes (free), global Landscape maps and regional Topo maps with street and area names, Points of Interest and highlighted difference between road and trail |
Dual Frequency Support | yes, L1 + L5 |
Sensors | |
Sensor List |
|
Additional Functionalities on Watch | |
List |
|
Supported Sports Activities | |
Activity List |
|
Training Metrics | |
List |
|
Metrics Measured in Daily Life | |
List |
|
Music | |
Format and Other | MP3, Bluetooth music transfer to wireless headphones |
Additional Parameters | |
Storage Space | 32 GB |
Storage Space for Activities | up to 1200 hours of activities |
Adjustable Menu Languages |
|
COROS App | Android, iOS |
Operating Temperature | -20°C to +50°C |
Water Resistance | 5 ATM (50 meters) |
Charging Time | less than 2 hours |
AI-Optimized Markdown Version for COROS APEX 4 GPS Watch
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