Compare Devices

Forerunner®45/45S Forerunner®245/245 Music Forerunner®645/645 Music Forerunner®735XT Forerunner®945
Color display
Auto Pause® feature
Auto Lap® feature
Auto/manual multisport
FTP
Personal records
Virtual Partner®/pace alerts
Heart rate-based calorie computation
Calculates calories burned
Customizable screen(s)
Advanced workouts
Accelerometer
VO2 max estimate
Recovery time
Race predictor
Connected features
Step counter
Auto goal
Move bar
Sleep monitoring
Wrist-based heart rate1
Connect IQ Store Watch faces only
Advanced running dynamics
HRV stress test
Strava Live Segments
Lactate threshold
Performance condition
Anaerobic training effect
Aerobic training effect
Training load
Training status
Training load focus
Pulse Ox sensor2
Music Forerunner 245 Music only Forerunner 645 Music only
Garmin Pay service
Metal bezel
Bike power3
Cycling dynamics3
Shimano Di23
Open-water swim activity
HRM-Swim™ support