Apple Watch Series 8 (GPS Cellular) 45mm vs Polar Grit X Pro
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AI Matrix
Powered by Claude AIApple Watch Series 8 (GPS Cellular) 45mm edges out the Polar Grit X Pro in the smartwatches category, especially in display quality, scoring 37 vs 24. If you want the better overall smartwatches, Apple Watch Series 8 (GPS Cellular) 45mm is the recommended choice.
5 Reasons Why Apple Watch Series 8 (GPS Cellular) 45mm Is Better
- 1.Larger screen: 1.9" vs 1.2"
- 2.Lighter: 47g vs 75g
- 3.Lower price: $160 vs $499
- 4.Better display rating: 75 vs 17
- 5.Higher design rating: 60 vs 9
What are you giving up?
Picking Apple Watch Series 8 (GPS Cellular) 45mm over Polar Grit X Pro means trading these off.
You give up
- −Longer battery life: 100h vs 18h
You gain
- +$339 cheaper ($160 vs $499)
- +28g lighter (47g vs 75g)
- +Larger screen: 1.9" vs 1.2"
Spec Comparison
Apple Watch Series 8 (GPS Cellular) 45mmPolar Grit X Pro
Score Breakdown
Apple Watch Series 8 (GPS Cellular) 45mmPolar Grit X Pro
0
Battery Life35% weight
17Polar Grit X Pro Winner
28
Health Tracking25% weight
35Polar Grit X Pro Winner
85
Price15% weight
40Apple Watch Series 8 (GPS Cellular) 45mm Winner
75
Display15% weight
17Apple Watch Series 8 (GPS Cellular) 45mm Winner
60
Build Quality10% weight
9Apple Watch Series 8 (GPS Cellular) 45mm Winner
Scores are relative within the smartwatchescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
Apple Watch Series 8 (GPS Cellular) 45mm
Winner✓ Pros
- ●Lower price: $160 vs $499
- ●Lighter build: 47g vs 75g
- ●Better display score
- ●Water resistant (IP6X, WR50)
✗ Cons
- ●Shorter battery life: 18h vs 100h
- ●Weaker battery score
- ●Lower performance score
Polar Grit X Pro
✓ Pros
- ●Longer battery life: 100h vs 18h
- ●Higher performance score
- ●Better battery score
✗ Cons
- ●Higher price: $499 vs $160
- ●Higher price relative to value
- ●Lower display score
Spec Comparison
| Spec | Apple Watch Series 8 (GPS Cellular) 45mmW | Polar Grit X Pro |
|---|---|---|
| Display | 1.9"✓ | 1.2" |
| Display Type | Always-on Retina LTPO OLED | MIP |
| Resolution | 396 x 484 pixels | — |
| Chipset | Apple S8 SiP | — |
| OS | watchOS 9 | Polar OS |
| Heart Rate | Optical HR 24/7 | Yes |
| SpO2 | Yes (blood oxygen) | true |
| ECG | Yes (FDA approved) | true |
| Temperature | Wrist skin temperature | — |
| GPS | Yes | Yes |
| Workout Modes | 80+ | — |
| Swim Proof | 50m water resistance | — |
| Battery Life | 18hrs | 100hrs✓ |
| Bluetooth | Bluetooth 5.3 | 5.0 |
| NFC | Yes | Yes |
| Case Material | Aluminium | — |
| Water Resistance | IP6X, WR50 | 10ATM |
| Weight | 47g✓ | 75g |
| Price | 160$✓ | 499$ |
Who Should Buy
Buy Apple Watch Series 8 (GPS Cellular) 45mm if…
Buy the Apple Watch Series 8 (GPS Cellular) 45mm if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Polar Grit X Pro if…
The Polar Grit X Pro is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Apple Watch Series 8 (GPS Cellular) 45mm vs Polar Grit X Pro — FAQ
Apple Watch Series 8 (GPS Cellular) 45mm vs Polar Grit X Pro: which is better?
Apple Watch Series 8 (GPS Cellular) 45mm edges out the Polar Grit X Pro in the smartwatches category, especially in display quality, scoring 37 vs 24. If you want the better overall smartwatches, Apple Watch Series 8 (GPS Cellular) 45mm is the recommended choice.
Is Apple Watch Series 8 (GPS Cellular) 45mm better than Polar Grit X Pro?
Yes, Apple Watch Series 8 (GPS Cellular) 45mm scores higher overall (47 vs 59).
Which is cheaper, Apple Watch Series 8 (GPS Cellular) 45mm or Polar Grit X Pro?
Apple Watch Series 8 (GPS Cellular) 45mm is cheaper at $160 vs $499 for the Polar Grit X Pro.
Who should buy the Apple Watch Series 8 (GPS Cellular) 45mm?
Buy the Apple Watch Series 8 (GPS Cellular) 45mm if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Who should buy the Polar Grit X Pro?
The Polar Grit X Pro is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Which lasts longer, Apple Watch Series 8 (GPS Cellular) 45mm or Polar Grit X Pro?
Polar Grit X Pro lasts longer with 100 hours vs 18 hours for the other.
Which has a bigger screen, Apple Watch Series 8 (GPS Cellular) 45mm or Polar Grit X Pro?
Apple Watch Series 8 (GPS Cellular) 45mm has the larger display (1.9" vs 1.2").
Which is lighter, Apple Watch Series 8 (GPS Cellular) 45mm or Polar Grit X Pro?
Apple Watch Series 8 (GPS Cellular) 45mm is lighter at 47g vs 75g.
Related Comparisons
Full Apple Watch Series 8 (GPS Cellular) 45mm review →Full Polar Grit X Pro review →All Apple Smartwatches →All Polar Smartwatches →
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.