Built for the rugged, the relentless, and the fearless — the COROS APEX 4 is the definitive mountain sports GPS watch. Meticulously engineered with alpine-grade materials, laser-precise sensors, and ultra-durable power, it’s made to help you train harder, navigate smarter, and rediscover endurance.

Key Features

Alpine-Grade Build: Crafted with a Grade 5 titanium bezel and reinforced lugs, the APEX 4 delivers exceptional strength while staying feather-light. The sapphire-glass screen is built to withstand rugged terrain. 
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High-Visibility Display: The 3rd-generation Memory-in-Pixel (MIP) touch screen remains crystal-clear in bright sunlight, deep snow, or the shifting shadows of the mountains. 
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Long-Lasting Battery Life: Choose between two sizes:

46 mm — up to 65 hours in “All-Systems GPS” mode 
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42 mm — up to 41 hours 
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Ultra-Precise Navigation: Dual-frequency GPS, a dual-range barometer, and specialized vertical GPS algorithms deliver pinpoint accuracy for pacing, altitude, and elevation — even in dense forests or alpine walls. 
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Advanced Mapping: On-device global maps with two layers (topographic and landscape), plus trail/street names, POIs, and turn-by-turn navigation — all rendered with zero lag. 
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Voice & Audio Tools: This is one of COROS’s first watches with a built-in microphone and speaker — record voice notes (“Voice Pins”), receive audio activity alerts, and even take hands-free calls. 
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Comprehensive Training Metrics: Dive into tools like Training Load, Training Status, Base Fitness, and Recovery Timer — all synced to the COROS app to give you a 360° view of your training. 
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Recovery & Well-Being Tracking: Monitor HRV (heart rate variability), SpO₂, sleep quality, and daily stress to know exactly when to push and when to recover. 
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Adventure Journal: Use voice pins, terrain photos, and key activity data to log your excursions. Revisit them later or use them to plan your next ascent. 
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Weather-Ready: Real-time weather data, air pressure readings, and environmental awareness tools keep you informed in remote conditions. 
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Rugged Yet Comfortable: Despite its tough build, it remains worn on the wrist with ease (around 51 g for the 46 mm with a nylon band). 
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Why Choose the APEX 4?
Designed specifically for mountain athletes, the APEX 4 is ideal for:
Trail runners pushing through long, remote routes
Climbers navigating technical terrain
Ski tourers tracking vertical gains and real-time altitude
Anyone who needs reliable, long-lasting performance — without sacrificing durability

Whether you're racing through a high-altitude trail, summiting rocky ridges, or logging epic multi-day treks — the APEX 4 is built to handle your ambition.