Coros APEX 4 GPS Outdoor Watch

The COROS APEX 4 is a premium GPS sports watch engineered for athletes who train and compete in demanding mountain environments. Built for trail running, alpine climbing, ski touring, hiking and endurance training, it combines a lightweight titanium construction, scratch-resistant sapphire glass, highly accurate dual-frequency GPS, advanced mapping and extended battery life.

Available in 42 mm and 46 mm case sizes, APEX 4 is designed to provide the durability required for technical outdoor activities without the weight of a traditional rugged watch. The Grade 5 titanium bezel, reinforced lugs and sapphire glass provide excellent resistance to everyday impacts and scratches, while the third-generation Memory-in-Pixel (MIP) display remains highly readable in direct sunlight, snow and changing mountain conditions.

APEX 4 features dual-frequency GPS and enhanced Vertical GPS Algorithms, designed to maintain accurate positioning in difficult environments such as dense forests, steep couloirs and areas surrounded by high alpine walls. A dual-range barometer provides precise elevation and weather-related data, while the advanced optical heart-rate sensor improves training and recovery monitoring.

The watch also features global topographic and landscape maps, trail and street names, points of interest and turn-by-turn navigation. Its upgraded processor provides significantly faster map and graphic rendering, helping you navigate routes without the delays associated with conventional mapping systems.

Key Features

• Premium mountain sports GPS watch
• Available in 42 mm and 46 mm sizes
• Grade 5 titanium bezel
• Reinforced lugs for improved durability
• Scratch-resistant sapphire glass
• Third-generation always-on Memory-in-Pixel display
• 1.3-inch display on 46 mm / 1.2-inch display on 42 mm
• Dual-frequency GPS
• Enhanced Vertical GPS Algorithms
• Dual-range barometer for elevation and weather data
• Global topographic and landscape maps
• Trail and street names
• Points of interest (POIs)
• Turn-by-turn navigation
• Up to 65 hours of All-Systems GPS on 46 mm
• Up to 41 hours of All-Systems GPS on 42 mm
• Built-in microphone and speaker
• Hands-free calling
• Voice Pins for recording notes during activities
• Audible pace and navigation alerts
• Advanced trail running, climbing and ski touring features
• Effort Pace for trail running
• HRV, sleep, SpO₂ and training-load monitoring
• Recovery and readiness tracking
• 3D activity flyovers through the COROS app
• Adventure Journal for recording Voice Pins, photos and activity details
• Support for 30+ activity modes
• Compatibility with external Bluetooth sensors
• Integration with Strava, Apple Health and other platforms
• USB-C charging cable sold separately.

Technical Specifications

Built for the Mountains

APEX 4 is purpose-built for athletes who need accurate data, dependable navigation and long battery life in demanding terrain. Dedicated features for trail running, climbing and ski touring allow the watch to adapt to the specific demands of vertical and technical sports.

For trail runners, Effort Pace provides an equivalent flat-ground pace to help judge effort on climbs and descents. For climbers, APEX 4 provides dedicated climbing modes and a carabiner, while ski-tourers can use real-time elevation tracking, topographic maps and weather information.

COROS APEX 4 — alpine-grade construction, precision navigation and endurance battery life for athletes who train beyond the limits of ordinary sports watches.