Garmin Fenix 8 Pro vs Apple Watch Ultra 3: Two runners compare two of the best running watches

The Run Testers October 22, 2025
Video Thumbnail
The Run Testers Logo

The Run Testers

@theruntesters

About

Running watches, form trackers, running shoes, apparel, nutrition. If you use it to run better, faster or just to get more fun from your miles, we test it. We are The Run Testers and we test running stuff. Don't forget to hit subscribe and ring the notifications bell to hear when we've tested the latest kit. Visit the website: https://theruntesters.com/

Video Description

The Apple Watch Ultra 3 is the best smartwatch for runners, while the Garmin Fenix 8 Pro is the most feature-packed sports watch on the market. If you’re trying to pick between them, Kieran and Nick have racked up plenty of miles while using both watches, including running marathons while wearing both, and give the pros and cons of each in this video. 00:00​​​​ - Intro 00:13 - Design & Key Stats 03:09 - The Run Test 15:20 - Verdict More ways to enjoy The Run Testers Check out our website: Best running shoes of 2024: https://bit.ly/3UbxNs3 Best running watches of 2024: https://bit.ly/3DavU99 Best carbon plate running shoes of 2024: https://bit.ly/3NvlD9x Subscribe: https://www.youtube.com/c/TheRunTesters?sub_confirmation=1 Follow Us: https://www.instagram.com/theruntesters/?hl=en Listen to The Run Testers Podcast: https://theruntesters.com/the-run-testers-podcast/ Watch The Run Testers Shorts: https://www.youtube.com/@TheRunTesters/shorts

You May Also Like

Upgrade Your Run with These Essentials

AI-recommended products based on this video

Loading...
2200mAh / 8.14Wh Battery for Garmin E1GR, E1GRVIRBELITE, E2GR, E2GRVIRBELITE, VIRB, VIRB Elite, Virb Elite Action HD Camera 1. PN:Garmin 010-11599-00, 010-11654-03

2200mAh / 8.14Wh Battery for Garmin E1GR, E1GRVIRBELITE, E2GR, E2GRVIRBELITE, VIRB, VIRB Elite, Virb Elite Action HD Camera 1. PN:Garmin 010-11599-00, 010-11654-03

(0)
$33.08
FREE delivery Sep 3 - 15
Loading...
JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

(959)
$19.99
FREE delivery Sat, Jun 14 on your first order
Loading...
Travel Essentials for Apple Watch Charger, 3 in 2 Multi Fast Charging Cable for iPhone Charger, USB C Cable Cord Compatible with iWatch Ultra(Gray, 4FT)

Travel Essentials for Apple Watch Charger, 3 in 2 Multi Fast Charging Cable for iPhone Charger, USB C Cable Cord Compatible with iWatch Ultra(Gray, 4FT)

(45)
$9.19
FREE delivery Sat, Apr 4 on your first order
Loading...
JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

(959)
$19.99
FREE delivery Sat, Jun 14 on your first order
Loading...
JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

JoyGeek 3-in-1 Magnetic Wireless Charging Station for iPhone 16/15/14/13/12 Series & Apple Watch Ultra 2/SE; 360° Adjustable Phone Stand with 18W Adapter, Compatible with AirPods Pro/3/2 Recycled Claim Standard Blended

(959)
$19.99
FREE delivery Sat, Jun 14 on your first order
Loading...
Apple Watch SE (2nd Gen) [GPS 44mm] Smartwatch with Midnight Aluminium Case with Midnight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

Apple Watch SE (2nd Gen) [GPS 44mm] Smartwatch with Midnight Aluminium Case with Midnight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

(48)
$299.00$224.25
FREE delivery Tue, Jul 1
300+ bought in past month
Loading...
Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

(55)
$259.00$194.25
PrimeFREE delivery Sat, Jun 14
200+ bought in past month
Loading...
Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Water-Resistant

(81)
$259.00
FREE delivery Thu, Jun 19
500+ bought in past month
Loading...
Apple Watch Series 10 [GPS 46mm] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band. Fitness Tracker, ECG App, Always-On Retina Display, Water-Resistant

Apple Watch Series 10 [GPS 46mm] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band. Fitness Tracker, ECG App, Always-On Retina Display, Water-Resistant

(1,728)
$413.99
Prime
400+ bought in past month