Garmin fēnix 8 vs Garmin Instinct 3 AMOLED
Garmin fēnix 8 (2024, listed at $1099) and Garmin Instinct 3 AMOLED (2025, listed at $499) are both sport watches, so the choice comes down to specifics.
Specs last updated · prices are list prices
Garmin fēnix 8
Garmin's no-compromise multisport flagship — built-in dive computer, AMOLED, multi-band GPS.
Garmin Instinct 3 AMOLED
First AMOLED Instinct — MIL-STD-810 toughness with a vivid color screen and built-in flashlight.
The verdict
On the numbers we track, Garmin fēnix 8 wins on tracked features (7 vs 3); Garmin Instinct 3 AMOLED wins on battery life (18 days vs 16 days), weight (60 g vs 73 g) and price ($499 vs $1099).
Bottom line: on raw specs the Garmin Instinct 3 AMOLED leads 3 to 1, but five spec categories are only a starting point. Match it to your phone, your main sport and your budget before you decide, or run the free quiz to see how each ranks for your answers.
Spec by spec
| Spec | Garmin fēnix 8 | Garmin Instinct 3 AMOLED |
|---|---|---|
| Battery (rated) | 16 days | 18 days |
| Weight | 73 g | 60 g |
| List price | $1099 | $499 |
| Water rating | 10ATM | 10ATM |
| Tracked features | 7 | 3 |
| Case size | 47 mm | 45 mm |
| Display | AMOLED | AMOLED |
| Works with | both iPhone and Android | both iPhone and Android |
| Listed best for | multisport and triathlon, outdoor adventure and running | outdoor adventure and multisport and triathlon |
| Released | 2024 | 2025 |
Trophy marks the better value on the five measurable specs. Battery is the manufacturer's rating, not our test. How we score is on the methodology page.
Feature overlap
Both have (3)
- built-in GPS
- blood-oxygen (SpO₂)
- swim tracking
Only Garmin fēnix 8 (4)
- on-device music
- contactless payments
- AMOLED display
- offline maps
Only Garmin Instinct 3 AMOLED (0)
Nothing unique.
Which one should you pick?
Pick the Garmin fēnix 8 if…
- You need on-device music, contactless payments, AMOLED display and offline maps, which the Garmin Instinct 3 AMOLED does not list.
- Your main use is running: it is listed for that and the Garmin Instinct 3 AMOLED is not.
- You might switch phones: it works with both iPhone and Android, the Garmin Instinct 3 AMOLED only works with Android.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 47 mm case we list is large (check whether a smaller size is sold).
- • You want something light enough to sleep in — it weighs 73 g.
- • You are watching your budget — the list price is $1099.
Pick the Garmin Instinct 3 AMOLED if…
- You want to spend less: it lists for $600 less.
- You want fewer charges: about 18 days per charge vs 16 days.
- You want a lighter watch: 60 g vs 73 g.
- You might switch phones: it works with both iPhone and Android, the Garmin fēnix 8 only works with Android.
- You want the newer model (2025 vs 2024).
Frequently asked questions
Which has better battery life, the Garmin fēnix 8 or the Garmin Instinct 3 AMOLED?
The Garmin Instinct 3 AMOLED has the longer rated battery life: about 18 days per charge against 16 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.
Which is cheaper, the Garmin fēnix 8 or the Garmin Instinct 3 AMOLED?
The Garmin Instinct 3 AMOLED has the lower list price: $499 against $1099 in our database. List prices change often, so check Amazon for today's price.
Do the Garmin fēnix 8 and Garmin Instinct 3 AMOLED work with iPhone and Android?
Yes, they have the same phone support: both iPhone and Android.
Which is better for swimming, the Garmin fēnix 8 or the Garmin Instinct 3 AMOLED?
Neither has an edge on water rating: both are rated 10ATM. 10ATM is suitable for swimming and surface water sports. It is not a dive rating unless the maker says so.
Not sure either is right for you?
Nine questions about your phone, sport, wrist and budget, scored against all of our watches with the reasoning shown.
Take the free quizWhere each one ranks #1 in our quiz
Garmin fēnix 8
Garmin Instinct 3 AMOLED
It is not the top pick for any standard quiz profile.