| Factor | Garmin Running Watch | Apple Watch |
|---|---|---|
| Battery life | 7-30+ days | 18-36 hours |
| GPS accuracy | Excellent | Good |
| Running metrics | Excellent (advanced) | Good (basic-moderate) |
| Smartwatch features | Moderate | Excellent |
| App ecosystem | Garmin Connect | Apple Health + apps |
| Price | £250-1000+ | £350-800+ |
| Design | Sporty/functional | Premium lifestyle |
Choose Garmin Running Watch when…
You run seriously, want the best GPS accuracy, need long battery for ultra/marathon training, want advanced metrics (VO2 max, training load, race predictor), or do triathlon/multisport.
Choose Apple Watch when…
You're a casual runner who wants a general smartwatch, are deeply in the Apple ecosystem, prioritise notifications and apps over running analytics, or prefer the premium design of Apple Watch.
Gear for both
Garmin Forerunner 265
The leading mid-range Garmin GPS running watch with AMOLED display.
Check price on AmazonApple Watch Ultra 2
Apple's most capable running watch — long battery, accurate GPS.
Check price on AmazonAs an Amazon Associate we earn from qualifying purchases.
FAQ
Can Apple Watch track a marathon?
Yes — Apple Watch Series 9 and Ultra have accurate GPS and can track a full marathon. The main limitation is battery life (the Ultra lasts longer at 60+ hours) and less granular post-run analytics compared to Garmin.
Is Garmin worth it for casual runners?
If you run 3+ times a week and care about training data, yes. For occasional runners, an Apple Watch or cheaper alternative provides all the data you need. Garmin's value increases with training frequency and goal-seriousness.
How accurate is GPS on running watches?
Modern GPS running watches are typically accurate to within 1–3% for distance on open courses. Accuracy degrades in urban canyons (tall buildings blocking satellite signals), on forest trails, and in tunnels. Dual-frequency GPS (available in higher-end Garmin models) significantly improves accuracy in difficult conditions. For 95% of runners, GPS accuracy on standard routes is sufficient — calibration using known course distances helps verify your specific device's accuracy.