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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 • •