Garmin Forerunner 45S vs. Garmin Approach S20

Smartwatch Comparison, Reviews and Tests

Detailed comparison and review of Garmin Forerunner 45S and Garmin Approach S20. With our comprehensive overview, you can simply compare size, design, functions, battery capacities, but also other key features of both smartwatches and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the watch that best fits your needs and expectations.

Smartwatch Specifications Comparison

Garmin Forerunner 45S vs. Garmin Approach S20 Comparison Chart
GENERAL Garmin Forerunner 45S Garmin Approach S20
Product Type Sport watch Sport watch
Supported Host Device OS iOS, Android iOS, Android
Activity/Sport - Golf
Wearing Style Watch style Watch style
Width 39.5 mm -
Height 39.5 mm -
Depth 11.4 mm -
Weight 32 g -
Body Details - Sensor: 13 mm x 27 mm 9 g
Protection Waterproof Waterproof
Clock Display Yes Yes
FEATURES Garmin Forerunner 45S Garmin Approach S20
Sensors Accelerometer, heart rate Accelerometer
Tracking Data Distance, time, speed, calories burned, sleep activity, heart rate, stress level Distance, time, calories burned, activity, heart rate, steps taken
Goal Setting Yes Yes
Features Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device Sunlight readable, Garmin Connect compatible, TrueUp, Garmin AutoShot, TruSwing
Notifications Calendar, Email, social apps Applications
Vibrating Alert Yes -
Navigation (GPS) - GPS receiver
CONNECTIVITY Garmin Forerunner 45S Garmin Approach S20
Wireless Interface Bluetooth, ANT+ Bluetooth, ANT+
DISPLAY Garmin Forerunner 45S Garmin Approach S20
Type Memory-in-Pixel LCD - colour - transflective Memory-in-Pixel LCD - monochrome
Resolution 208 x 208 pixels 128 x 128 pixels
Screen Size 1.04" -
Dimensions (WxH) - 23 mm x 23 mm
INPUT DEVICE Garmin Forerunner 45S Garmin Approach S20
Type - Single push-button
CASE Garmin Forerunner 45S Garmin Approach S20
Crystal Type - Chemically strengthened glass
Case Shape Round Rounded square
Case Details White | Iris | Black -
BAND Garmin Forerunner 45S Garmin Approach S20
Band Type Band Strap
Band Size S -
Fits Wrist with Circumference 124-185 mm -
Changeable Yes -
Clasp Type Buckle Buckle
Band Material Silicone Silicone
Band Colour White | Iris | Black Black
STORAGE Garmin Forerunner 45S Garmin Approach S20
Storage Capacity - 64 MB
BATTERY Garmin Forerunner 45S Garmin Approach S20
Technology - Lithium Ion
Battery Life - 56 day(s)
Battery Life Details GPS mode - up to 13 hour(s)
Smartwatch mode - up to 7 days
Smartwatch mode - up to 56 days
GPS mode - up to 15 hours
Rechargeable Battery - Yes
MISCELLANEOUS Garmin Forerunner 45S Garmin Approach S20
Included Accessories Charging/data cable Charging/data cable
Preloaded Software - Calendar, Time, Alarm Clock
Max Depth of Water Resistance 50 m 50 m
Max Operating Temperature - 60 °C
Min Operating Temperature - -20 °C
Warranty - 1-year warranty
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