The VIOFO A139 Pro (ASIN B09BLBH4FB) is a 4K front / 1440p rear dual-channel dash cam with a Sony STARVIS 2 IMX678 front sensor, built-in WiFi and GPS, and support for up to 256GB microSD. Available on Amazon.ca at $199, it delivers the highest specification-per-dollar ratio in the 4K dual-channel dash cam category.
| Front Resolution | 4K UHD (3840×2160) at 30fps or 2K at 60fps |
| Rear Resolution | 2K 1440p (rear camera included) |
| Sensor | Sony STARVIS 2 IMX678 (front) |
| WiFi + GPS | Both included (GPS track with speed and location data) |
| Storage | MicroSD up to 256GB (not included) |
| Parking Mode | Hardwire kit compatible (sold separately) |
"4K front, 1440p rear, Sony sensor, WiFi, GPS, for $200. I looked at Garmin's 1440p for the same money and there's no comparison in specs. VIOFO wins on paper and in practice."
Source: Reddit r/dashcam
"The night footage from the Sony STARVIS sensor makes streetlit roads look like daytime. For a $200 cam this sensor performance is remarkable."
Source: Amazon.ca reviewer
"Buy the endurance-rated microSD at the same time. The 4K+1440p dual channel fills regular cards fast and they die from heat cycling. Budget an extra $35 for the card."
Source: Reddit r/dashcam
App interface is functional but not polished
The VIOFO app handles file transfer and basic settings but lacks the UI refinement of Garmin or Thinkware apps. The clip sharing workflow requires more steps and the app stability gets mixed reviews on Android.
Source: Reddit r/dashcamWarranty support requires email for Canadians
Unlike Garmin or Thinkware (available at Best Buy for walk-in support), VIOFO warranty claims are handled through North American email support. Resolution takes longer without retail walk-in access.
Source: Amazon.ca reviewerRear cable routing can be complex in some vehicles
The included rear camera cable is long enough for most vehicles but cable routing under headliner trim requires patience and sometimes a trim tool. Some users find the routing process challenging in crossovers and SUVs with thick headliner padding.
Source: Amazon.ca reviewerThe VIOFO A139 Pro is the best value 4K dual-channel dash cam available—delivering Sony STARVIS 2 sensor 4K front and 1440p rear at $199, a specification that competing brands sell for $300–$400. The tradeoff is Canadian warranty support via email rather than retail walk-in, and app software that lags the premium brands. For specification-conscious buyers on a budget who want maximum video evidence quality per dollar, the A139 Pro is the clear choice. Buyers who prioritize polished software or in-store support should choose Garmin or Thinkware.