Official manufacturer render.
COROS
APEX 4 42mm
Watch2025Released
- 1.2-inch Memory-in-Pixel (3rd gen MIP touch)
- All-satellite dual-frequency GNSS
- 44 g
- From $429
Physical specifications
1.2"
Display size
44 g (with nylon band)
Case weight
42.6 mm
Case height
42.6 mm
Case width
14.0 mm
Case thickness
Release and pricing
- Announced
- October 15, 2025
- Released
- October 15, 2025
- Starting price
- $429
- Market
- US
Display
- Display size
- 1.2"
- Display technology
- Memory-in-Pixel (3rd gen MIP touch)
- Resolution
- 240 × 240
- Protection
- Sapphire glass
Performance
- Chipset
- All-satellite dual-frequency GNSS
- Storage
- 32 GB
- Expandable storage
- No
Battery & charging
- Charging standard
- Magnetic charging (<2 h). Daily use 15 days; all-systems GPS 34 h; dual-frequency GPS 26 h; Endurance all-systems 41 h (extended mode — not everyday life); music modes shorter
- Battery type
- Lithium-ion
Build & durability
- Frame
- Fiber-reinforced polymer; Grade 5 titanium bezel
- Back
- Fiber-reinforced polymer
- Front
- Sapphire glass
- Ingress protection
- 5 ATM
Connectivity
- Cellular
- GPS / GLONASS / Galileo / BeiDou / QZSS (dual-frequency), Downloadable global Landscape / Topo maps, Speaker + dual microphone, ECG sensor
- Wi‑Fi
- Wi-Fi / COROS App
- Bluetooth
- Bluetooth
Sizometry Analysis
Everyday usability
Estimated from the watch’s size, weight, battery, display, and intended wearing conditions.
Wrist comfort
NoticeableThe larger case gives it a noticeable wrist presence, especially on smaller wrists.
Sleep comfort
NoticeableIts thickness and larger footprint may remain noticeable when sleeping.
Battery usability
Data unavailableAvailable battery information is insufficient for a reliable daily-use assessment.
Screen and controls
GoodDetailed brightness information is unavailable, so outdoor visibility cannot be fully assessed.
Workout usability
ExcellentIts low weight, water resistance, and GPS support make it well suited to running and gym sessions.
Models and configurations
- Storage
- 32 GB
- Connectivity
- GPS / GLONASS / Galileo / BeiDou / QZSS (dual-frequency)Downloadable global Landscape / Topo mapsSpeaker + dual microphoneECG sensor
