PURE MOUNTAIN PERFORMANCE
Shaped by years of relentless development and insight from the world’s best mountain athletes, APEX 4 delivers ultra-precise GPS, best in class battery, zero-lag mapping, a microphone and speaker, plus advanced training and recovery tools to help you take on your biggest goals.

ALPINE-GRADE ENGINEERING
LIGHTWEIGHT TITANIUM. REINFORCED LUGS. SAPPHIRE GLASS.
Grade 5 Titanium Bezel, Reinforced Lugs add strength and create a lightweight, comfortable feel
51g (46mm) and 44g (42mm) with the nylon band Scratch-Resistant Sapphire Glass 3rd-Generation Memory-in-Pixel screen

RAZOR-SHARP ACCURACY, WITHOUT LIMITS
APEX 4 delivers industry-leading accuracy across GPS, pace, heart rate, and elevation tracking, along with the ultra-long battery life you have come to expect from COROS.

TOOLS FORTHE ASCENT
Accurate data, zero-lag mapping, and incredible battery set you up for success, no matter the task at-hand.

YOUR ADVENTURE JOURNAL
Adventure Journal logs Voice Pins, terrain photos, and key details from your effort so you can review what you saw, said, and did. Plan better lines, adjust your strategy, and leverage more recon for your next big goal.

LONGER BATTERY
APEX 4 pairs an always-on, 3rd-gen MIP display with deeper colors and higher contrast—built to stay clear in sun, snow, or shadows. With up to 65 hours of All Systems GPS (46mm) or 41 hours (42mm), you'll have full confidence in your watch whether it's linking up the Grand Traverse, or the full loop around Mont Blanc.

VERTICAL GPS TRACKING
With our most accurate vertical GPS algorithm yet, dual-frequency tracking, a precision heart rate sensor, and a dual-range barometer for sharper elevation and weather data, you won't have to worry about any missing meters when your activity is finished.

FAST MAPPING
APEX 4’s real-time map engine renders instantly—delivering global landscape and topo maps with turn-by-turn guidance, trail names, and POIs.

• 65hrs of GPS battery (46mm) or 41hrs (42mm), enough to get you through your longest days.
• Our most powerful mapping with free Global Maps, street and trail names, turn-by-turn navigation, and POI's
• Precision dual-frequency GPS with vertical algorithms built for alpine terrain and sheer walls.
• 1.3 inch Memory-in-Pixel touch screen (46mm) or 1.2 inch (42mm), with sharp contrast and easy readability in sun, snow, or shadows.
• A titanium bezel and sapphire glass deliver a lightweight feel with alpine-grade durability.
• Built-in speaker and mic for pace alerts, Voice Pins, and hands-free calls.
• Track and manage your recovery, HRV, sleep, SpO2, and training load for a 360 degree view of your training.
• Study every step of your training and racing with 3D Flyovers and Adventure Journaling.