Viofo
Viofo A139 Pro (4K)
Security/dash cam · 4K
85
/ 100
From $400
VS
Opal C1 wins by 2
Opal
Opal C1
4K Sony IMX378 · True-to-life color
87
/ 100
From $299
Specdex verdict
Opal C1 takes it — here’s why.
In our weighted Specdex score, Viofo A139 Pro (4K) lands at 85 and Opal C1 at 87. That puts Opal C1 ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Viofo A139 Pro (4K) if…
- ✓Weatherproof (most)
- ✓Night vision
- ✓Cloud + local storage options
Pick Opal C1 if…
- ✓Mirrorless-quality image
- ✓Built-in mic array
- ✓Solid software
Viofo A139 Pro (4K) 85
vs 87 Opal C1
Score breakdown
Viofo A139 Pro (4K)
85 image 81
features 85
build 86
value 82
Opal C1
87 image 94
features 82
build 90
value 78
Specs side-by-side
| Spec | Viofo A139 Pro (4K) | Opal C1 |
|---|---|---|
| Type | Security/dash cam | — |
| Resolution | 4K | 4K / 30 fps |
| Release year | 2022 | — |
| Sensor | — | Sony IMX378 1/2.3″ |
| Connectivity | — | USB-C |
Viofo A139 Pro (4K)
Pros
- +Weatherproof (most)
- +Night vision
- +Cloud + local storage options
Cons
- −Cloud storage subscription
- −Wi-Fi dependency
- −Privacy considerations
Opal C1
Pros
- +Mirrorless-quality image
- +Built-in mic array
- +Solid software
Cons
- −macOS favoured, Windows lags
- −Premium price
- −Software required
FAQ: Viofo A139 Pro (4K) vs Opal C1
Which is better, Viofo A139 Pro (4K) or Opal C1? +
Opal C1 scores 87 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.
Is Viofo A139 Pro (4K) worth the price? +
At $400, Viofo A139 Pro (4K) delivers a Specdex score of 85 — strongest in build.
Is Opal C1 worth the price? +
At $299, Opal C1 delivers a Specdex score of 87 — strongest in image.
Does Viofo A139 Pro (4K) or Opal C1 last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.