Sizometry
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APEX 4 46mm Front view

Official manufacturer render.

COROS

APEX 4 46mm

Watch2025Released
  • 1.3-inch Memory-in-Pixel (3rd gen MIP touch)
  • All-satellite dual-frequency GNSS
  • 51 g
  • From $479

Physical specifications

1.3"

Display size

51 g (with nylon band)

Case weight

46.2 mm

Case height

46.2 mm

Case width

13.7 mm

Case thickness

Release and pricing

Announced
October 15, 2025
Released
October 15, 2025
Starting price
$479
Market
US

Display

Display size
1.3"
Display technology
Memory-in-Pixel (3rd gen MIP touch)
Resolution
260 × 260
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 24 days; all-systems GPS 53 h; dual-frequency GPS 41 h; Endurance all-systems 65 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 + microphone, ECG sensor
Wi‑Fi
Wi-Fi / COROS App
Bluetooth
Bluetooth

Sources and measurement notes

Sizometry compares published specifications and calculates differences. These are not hands-on measurements or tests of comfort, performance or pocket fit.

Check the exact model, year, region and configuration on the linked page. References may cover several variants. Folded and unfolded dimensions differ; cases and camera protrusions may change the space a device needs. Drawings share a relative scale and are not calibrated to life size on your screen.

Sizometry Analysis

Everyday usability

Estimated from the watch’s size, weight, battery, display, and intended wearing conditions.

  • Wrist comfort

    Substantial on the wrist

    Its large footprint and mass make it a substantial presence on the wrist.

  • Sleep comfort

    Noticeable

    Users sensitive to wrist pressure may prefer a smaller and lighter model overnight.

  • Battery usability

    Data unavailable

    Available battery information is insufficient for a reliable daily-use assessment.

  • Screen and controls

    Easy to use

    Detailed brightness information is unavailable, so outdoor visibility cannot be fully assessed.

  • Workout usability

    Well suited

    Strong water resistance and GPS availability improve its usefulness for outdoor training.

Models and configurations

Storage
32 GB
Connectivity
GPS / GLONASS / Galileo / BeiDou / QZSS (dual-frequency)Downloadable global Landscape / Topo mapsSpeaker + microphoneECG sensor

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