Garmin Forerunner 45 vs. Apple Watch Ultra 2

Smartwatch Comparison, Reviews and Tests

In depth comparison and review of Garmin Forerunner 45 and Apple Watch Ultra 2. Compare sizes, functions, displays, batteries and other important specifications and features to easily choose the right smartwatch for you. Our goal is to help you uncover differences between the products and find the watch that will best fit your needs.

Smartwatch Specifications Comparison

Garmin Forerunner 45 vs. Apple Watch Ultra 2 Comparison Chart
GENERAL Garmin Forerunner 45 Apple Watch Ultra 2
Product Type Smart watch Smart watch
Operating System - WatchOS 10
Supported Host Device OS iOS, Android iOS 17 or later
Activity/Sport - Multisport, custom workouts
Wearing Style Watch style Watch style
Audio Input - Three-microphone array
Audio Output - Dual speakers
Width 42 mm -
Height 42 mm -
Depth 11.4 mm -
Weight 36 g -
Body Details - Case only: 61.4 g
Body Material - Aerospace-grade titanium
Protection Waterproof Water-resistant, splash-resistant, corrosion resistant, dust-resistant
Clock Display Yes Yes
FEATURES Garmin Forerunner 45 Apple Watch Ultra 2
Sensors Accelerometer, heart rate Accelerometer, ambient light sensor, digital compass, depth gauge, electrical heart sensor, ECG sensor, blood oxygen sensor, gyroscope, water temperature sensor, temperature sensing, optical heart sensor (3d gen), always-on altimeter
Tracking Data Distance, time, speed, calories burned, sleep activity, heart rate, stress level Distance, time, calories burned, activity, sleep activity, heart rate, blood oxygen saturation, sleep stages, menstrual cycle, ECG, ovulation phase, rapid eye movement (REM), depth
Modes - Night mode
Goal Setting Yes Yes
Features Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device Call handling, store & play music, Fall detection, Emergency SOS, heart rate zones, Family Setup support, International Emergency Calling, Siren (86-decibel), Crash Detection, noise monitoring, Compass Waypoint, precision finding for iPhone, brightness: 3000 nits, flashlight boost, track detection
Notifications Calendar, Email, social apps Calendar, SMS, Email, high and low heart rate, irregular rhythm, cardio fitness
Vibrating Alert Yes Yes
Feedback Type - Audio alert, vibration alert, visual interface
Navigation (GPS) - GPS/GLONASS/Galileo/BeiDou/QZSS receiver
Payment Technology - Apple Pay
Internet of Things (IoT) Compatible - Yes
IoT Intelligent Assistant - Siri
IoT Voice Controlled - Direct
CELLULAR Garmin Forerunner 45 Apple Watch Ultra 2
Technology - WCDMA (UMTS)
Mobile Broadband Generation - 4G
SIM Card Type - Electronic SIM card (e-SIM)
CONNECTIVITY Garmin Forerunner 45 Apple Watch Ultra 2
3M UMTS Band - Band 1, Band 2, Band 5, Band 10
4G LTE Band - Band 1, Band 2, Band 3, Band 4, Band 5, Band 6, Band 7, Band 8, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 39, Band 40, Band 41, Band 66
Wireless Interface Bluetooth, ANT+ IEEE 802.11b/g/n, LTE, Ultra-Wideband (UWB), Bluetooth 5.3
DISPLAY Garmin Forerunner 45 Apple Watch Ultra 2
Type Memory-in-Pixel LCD - colour - transflective Retina LTPO OLED - colour
Resolution 208 x 208 pixels 410 x 502 pixels
Screen Size 1.04" -
Screen Protection - Flat sapphire front crystal with display edge protection
Always On Display (AOD) - Yes
INPUT DEVICE Garmin Forerunner 45 Apple Watch Ultra 2
Type - Touch sensitive screen, customisable action button, side button, double tap gesture
CASE Garmin Forerunner 45 Apple Watch Ultra 2
Case Size - 49 mm
Case Shape Round Rectangular
Case Details Black Titanium
Crown Type - Digital with haptic feedback
BAND Garmin Forerunner 45 Apple Watch Ultra 2
Band Type Band Alpine Loop
Band Size L S
Fits Wrist with Circumference 129-197 mm 130-160 mm
Changeable Yes Yes
Clasp Type Buckle G-hook
Band Material Silicone Textile
Band Colour Black | Lava red Blue | Indigo | Olive | Orange/beige | Green/gray | Blue/black | Orange | White
STORAGE Garmin Forerunner 45 Apple Watch Ultra 2
Storage Capacity - 64 GB
CPU Garmin Forerunner 45 Apple Watch Ultra 2
Manufacturer - Apple
CPU Type - S9 SiP
Features - W3 Apple wireless chip, second-generation Ultra Wideband chip, 4-core Neural Engine
BATTERY Garmin Forerunner 45 Apple Watch Ultra 2
Technology - Lithium Ion
Battery Life - 36 hours
Battery Life Details GPS mode - up to 13 hour(s)
Smartwatch mode - up to 7 days
Normal use - up to 36 hour(s)
Low power mode - up to 18 hour(s)
Power saving mode - up to 72 hour(s)
Rechargeable Battery - Yes
Wireless Charging - Yes
MISCELLANEOUS Garmin Forerunner 45 Apple Watch Ultra 2
Included Accessories Charging/data cable Magnetic fast charger to USB-C cable (1 m)
Preloaded Software - GymKit, Oceanic+, Depth app
Compliant Standards - IP6X, BFR-free, PVC-free, Beryllium-free, Mercury-free, MIL-STD-810H, EN13319, Arsenic-free
Specific Absorption Rate (SAR) - 0.22 W/kg (head)
0.43 W/kg (limb)
Carbon Footprint - 0 kg carbon emissions
Max Depth of Water Resistance 50 m 100 m
Max Operating Temperature - 55 °C
Min Operating Temperature - -20 °C
Manufacturer Model Number - A2986
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