THE ULTIMATE MOUNTAIN SPORTS WATCH BUILT FOR TRAINING, RACING, AND BEATING YOUR PERSONAL BEST.
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.
MORE DETAILED MAPS
- LANDSCAPE
- TOPOGRAPHIC
- TURN-BY-TURN
- TRAIL AND STREET NAMES
Two map layers with 15m zoom plus trail and street names keep you oriented on trails, in the city, or on the slopes.
ELEVATION
- Calibrated for rapid weather changes and steep, technical terrain.
- Dual-range barometer
30x Faster map and graphic rendering speeds.
GPS
Precision that holds true in dense forests, steep couloirs, and sheer alpine walls.
BATTERY
Long enough to last 100 miles around Mont Blanc, or linking up the Grand Traverse.
- APEX 4 (46mm) 65 HRS
- APEX 4 (42mm) 41 HRS
+ Vertical GPS Algorithms for challenging environments *Endurance Satellite Mode1
MICROPHONE
Record Voice Pins to capture beta on the wall or save a note-to-self during your long run to help be better prepared next time.
IN PLAIN SIGHT
APEX 4's 3rd generation always-on MIP display delivers deeper colors, stays sharp in full sun, deep snow, and shadows.
SPEAKER
Take hands-free calls and listen to your activity alerts out loud.
WHERE ENDURANCE MEETS ALTITUDE
Mountain sports have unique demands. APEX 4 has been designed to meet all of them.
- TRAIL RUNNING
- CLIMBING
- SKIING
LONG RUN READY
From your first trail race to your next 100-mile win, APEX 4 provides on-device global maps, 3D terrain views, real-time Effort Pace¹, route planning, and fitness metrics designed to help you track your training.
MOUNTAIN SPORT TRAINING SYSTEM
APEX 4 and the COROS app form a connected training system built for athletes who want to improve.
RECOVERY AND READINESS HUB
- SLEEP
- HRV
- DAILY STRESS
- RECOVERY TIMER
TOOLS FOR THE 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.
BUILT-IN VOICE TOOLS
Take hands-free calls, record Voice Pins, or have your activity alerts played out-loud so you never have to break your attention.
SYNC, CONNECT AND CONTROL
Easily link to apps like Strava and Apple Health, stay updated with calls and texts, and control your camera—all from your watch.
System Languages
English, Simplified Chinese, Traditional Chinese, German, Spanish, French, Polish, Thai, Japanese, Korean, Portuguese, Italian, Russian, Vietnamese
* Does not include Greek language.
