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- Apex 4 (42mm)
CorosGPS sports watch
Coros Apex 4 (42mm)
Coros Apex 4 (42mm) is a GPS sports watch released in October 2025. Key specs: case size 43 mm, screen size 1.2″, battery life (smartwatch mode) 15 days, GPS battery life 34 h.
4.9Score
Display3.3
Battery life5.4
Health tracking4.9
Sports & outdoor4.5
Smart features6.6
Build & durability4.8
price range$380–480
- Released
- October 2025
- Type
- GPS sports watch
- Brand
Coros- Popularity
- #520 of 891
43 mmCase size
1.2″Screen size
NoAMOLED / OLED display
15 daysBattery life (smartwatch mode)
34 hGPS battery life
5 ATMWater resistance
56 gWeight
Spec guide
How it ranks among GPS sports watches of 2025
Screen size · 1.2″Bottom 8%Battery life (smartwatch mode) · 15 daysTop 31%GPS battery life · 34 hBottom 46%Water resistance · 5 ATMBottom 38%Weight · 56 gBottom 37%
Compared with GPS sports watches released in 2025. Bars show the share of models it beats.
Specifications
Full specifications
Design & durability
- Case size
- 43 mm
- Weight
- 56 g
- Thickness
- 14 mm
- Height
- 42.6 mm
- Width
- 42.6 mm
- Sapphire crystal
- Yes
- Lens / cover glass
- Sapphire Glass
- Strap material
- Silicone / Nylon
- Water resistance
- 5 ATM
- Water rating (maker)
- 5 ATM
Display
- Screen size
- 1.2″
- Panel
- 3rd Generation Memory-in-Pixel touch screen
- AMOLED / OLED display
- No
- Always-on display
- Yes
- Touchscreen
- Yes
- Resolution (width)
- 240 px
- Resolution (height)
- 240 px
- Pixel density
- 200 ppi
Battery
- Battery life (smartwatch mode)
- 15 days
- GPS battery life
- 34 h
- GPS battery life (dual-band)
- 26 h
Health sensors
- Optical heart rate
- Yes
- Blood oxygen (SpO2)
- Yes
- ECG
- Yes
- Temperature sensor
- Yes
- HRV tracking
- Yes
- Sleep tracking
- Yes
- Sensors
- Speaker to take hands-free calls or play activity alerts out-loud., Dual-Microphone with Noise Reduction, Optical Heart Rate Monitor, Barometric Altimeter, Accelerometer, Gyroscope, 3D Compass, Thermometer ), Optical Pulse Oximeter, Electrical Heart Rate Sensor for HRV and Wellness Checks
Sports & navigation
- Built-in GPS
- Yes
- Dual-band GPS
- Yes
- Satellite systems
- GLONASS, GALILEO, BDS, QZSS
- Offline maps
- Yes
- Barometric altimeter
- Yes
- Compass
- Yes
- Multisport / triathlon mode
- Yes
- Sport profiles
- 36
Connectivity
- Wi-Fi
- Wi-Fi 4
Smart features
- Calls from the wrist
- Yes
- Speaker
- Yes
- Microphone
- Yes
- Music on the watch
- Yes
- Storage
- 32 GB
Platform
- Platform
- Proprietary
Specs are collected from manufacturers and open databases and normalised to one format; check details with the seller before you buy.
Compare
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Smartwatches: GPS battery life from 30 h + ECG53Smartwatches: Offline maps + ECG64Smartwatches: Battery life (smartwatch mode) from 14 days + ECG86Smartwatches: Proprietary + ECG91Smartwatches: Dual-band GPS + offline maps100Smartwatches: Dual-band GPS + ECG100Smartwatches: Battery life (smartwatch mode) from 14 days + offline maps101Smartwatches: GPS battery life from 30 h + dual-band GPS104
