Amazfit T-Rex Dual Solar vs Garmin fenix 7 Pro Sapphire Solar
Amazfit T-Rex Dual Solar (2026, listed at $649.99) and Garmin fenix 7 Pro Sapphire Solar (2023, listed at $899) are both sport watches, so the choice comes down to specifics.
Specs last updated · table prices are list prices; each card shows Amazon's current price when available
Amazfit T-Rex Dual Solar
Solar-charging rugged AMOLED: titanium bezel, sapphire glass, 10 ATM, dual-band GPS with offline maps, a flashlight and up to 25 days of typical use.
Garmin fenix 7 Pro Sapphire Solar
Solar-extended fenix — sapphire crystal, 22-day battery, full topo maps and built-in flashlight.
The verdict
On the numbers we track, Amazfit T-Rex Dual Solar wins on battery life (25 days vs 22 days), weight (69 g vs 73 g) and price ($649.99 vs $899).
Bottom line: on raw specs the Amazfit T-Rex Dual Solar leads 3 to 0, 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 | Amazfit T-Rex Dual Solar | Garmin fenix 7 Pro Sapphire Solar |
|---|---|---|
| Battery (rated) | 25 days | 22 days |
| Weight | 69 g | 73 g |
| List price | $649.99 | $899 |
| Water rating | 10ATM | 10ATM |
| Tracked features | 6 | 6 |
| Case size | 51.4 mm | 47 mm |
| Display | AMOLED | MIP |
| Works with | both iPhone and Android | both iPhone and Android |
| Listed best for | outdoor adventure and multisport and triathlon | multisport and triathlon, outdoor adventure and running |
| Released | 2026 | 2023 |
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 (5)
- built-in GPS
- blood-oxygen (SpO₂)
- on-device music
- offline maps
- swim tracking
Only Amazfit T-Rex Dual Solar (1)
- AMOLED display
Only Garmin fenix 7 Pro Sapphire Solar (1)
- contactless payments
Which one should you pick?
Pick the Amazfit T-Rex Dual Solar if…
- You want to spend less: it lists for $249.01 less.
- You want fewer charges: about 25 days per charge vs 22 days.
- You want a lighter watch: 69 g vs 73 g.
- You need AMOLED display, which the Garmin fenix 7 Pro Sapphire Solar does not list.
- You might switch phones: it works with both iPhone and Android, the Garmin fenix 7 Pro Sapphire Solar only works with Android.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 51.4 mm case we list is large (check whether a smaller size is sold).
- • You want something light enough to sleep in — it weighs 69 g.
- • You are watching your budget — the list price is $649.99.
Pick the Garmin fenix 7 Pro Sapphire Solar if…
- You need contactless payments, which the Amazfit T-Rex Dual Solar does not list.
- Your main use is running: it is listed for that and the Amazfit T-Rex Dual Solar is not.
- You might switch phones: it works with both iPhone and Android, the Amazfit T-Rex Dual Solar only works with Android.
- You want a display that stays readable in direct sun and sips power.
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 want a bright, vivid AMOLED screen — this one uses a lower-power display.
Frequently asked questions
Which has better battery life, the Amazfit T-Rex Dual Solar or the Garmin fenix 7 Pro Sapphire Solar?
The Amazfit T-Rex Dual Solar has the longer rated battery life: about 25 days per charge against 22 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.
Which is cheaper, the Amazfit T-Rex Dual Solar or the Garmin fenix 7 Pro Sapphire Solar?
The Amazfit T-Rex Dual Solar has the lower list price: $649.99 against $899 in our database. List prices change often, so check Amazon for today's price.
Do the Amazfit T-Rex Dual Solar and Garmin fenix 7 Pro Sapphire Solar work with iPhone and Android?
Yes, they have the same phone support: both iPhone and Android.
Which is better for swimming, the Amazfit T-Rex Dual Solar or the Garmin fenix 7 Pro Sapphire Solar?
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
Amazfit T-Rex Dual Solar
Garmin fenix 7 Pro Sapphire Solar
It is not the top pick for any standard quiz profile.