Garmin Forerunner 45S vs. Garmin fēnix 6 Sapphire

Smartwatch Comparison, Reviews and Tests

Side by side comparison and review of Garmin Forerunner 45S and Garmin fēnix 6 Sapphire. Compare design, displays, functions, batteries and other key specifications and features to simplify the choice of your perfect smartwatch. Our goal is to make it easier for you to decide on the watch that will best meet your expectations by revealing the main differences between the products.

Smartwatch Specifications Comparison

Garmin Forerunner 45S vs. Garmin fēnix 6 Sapphire Comparison Chart
GENERAL Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Product Type Sport watch Sport watch
Supported Host Device OS iOS, Android iOS, Android
Activity/Sport - Running, swimming, ski, cycling, hiking, climbing, snowboarding, rower, kayaking, jumpmaster, stand up paddleboarding
Wearing Style Watch style Watch style
Width 39.5 mm 47 mm
Height 39.5 mm 47 mm
Depth 11.4 mm 14.7 mm
Weight 32 g 60 g
Body Material - Fibre-reinforced polymer
Protection Waterproof Waterproof
Clock Display Yes Yes
FEATURES Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Sensors Accelerometer, heart rate Accelerometer, barometric altimeter, pulse oximeter, 3-axis compass, optical heart sensor
Tracking Data Distance, time, speed, calories burned, sleep activity, heart rate, stress level Distance, time, speed, calories burned, activity, sleep activity, heart rate, steps taken, floors climbed, blood oxygen saturation, stress level
Goal Setting Yes Yes
Features Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device Find phone function, HR zones, Bluetooth Smart technology, VIRB control, inactivity alert, Move IQ, Find my Device, store & play music, Garmin Elevate, TrueUp, Body Battery, PacePro pace guidance, dual grid coordinates format
Notifications Calendar, Email, social apps Calendar, SMS, social apps, incoming calls
Vibrating Alert Yes Yes
Navigation (GPS) - GPS/GLONASS/Galileo receiver
Payment Technology - Garmin Pay
CONNECTIVITY Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Wireless Interface Bluetooth, ANT+ Bluetooth, Wi-Fi, ANT+
DISPLAY Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Type Memory-in-Pixel LCD - colour - transflective Memory-in-Pixel LCD - colour - transflective
Resolution 208 x 208 pixels 260 x 260 pixels
Screen Size 1.04" 1.3"
Screen Protection - Sapphire glass
INPUT DEVICE Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Type - Touch buttons
CASE Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Case Size - 47 mm
Case Shape Round Round
Case Back - Metal
Case Details White | Iris | Black Carbon grey DLC | Titanium
BAND Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Band Type Band Band
Band Size S -
Band Width - 22 mm
Fits Wrist with Circumference 124-185 mm 125-208 mm
Changeable Yes -
Clasp Type Buckle Buckle
Band Material Silicone Silicone
Band Colour White | Iris | Black Black | Ember orange | Titanium
STORAGE Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Storage Capacity - 32 GB
BATTERY Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Technology - Lithium Ion
Battery Life - 48 day(s)
Battery Life Details GPS mode - up to 13 hour(s)
Smartwatch mode - up to 7 days
Smartwatch mode - up to 14 days
GPS mode - up to 36 hour(s)
Max Battery GPS Mode - up to 72 hour(s)
Expedition GPS Mode - up to 28 days
Battery Saver Watch Mode - up to 48 days
GPS with Music mode - up to 10 hour(s)
Rechargeable Battery - Yes
MISCELLANEOUS Garmin Forerunner 45S Garmin fēnix 6 Sapphire
Included Accessories Charging/data cable Charging/data cable
Preloaded Software - Garmin Pay
Max Depth of Water Resistance 50 m 100 m
Warranty - 1-year warranty
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