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VIOFO A129 Pro vs. Vantrue X4S

Which 4K Dashcam is For You?

The highest resolution dash cam on the market is currently 4K, with image quality nearly equivalent to high-end, crystal TVs and camera systems. These dashcams are assured to capture the most detailed information required for evidence, including road signs and license plates.

The VIOFO A129 Pro, released in 2019, and the newer Vantrue X4S are two of the most discussed 4K dashcams on Reddit, Dashcamtalks, and other forums where users share their experiences. Let's see which of the 4Ks is the best fit for you.

Review: VIOFO A129 PRO Duo 4K Dash Cam

One of VIOFO's flagship dash cams is the VIOFO A129 Pro Duo. It is a 2-channel system with all of the features of its predecessors, the A129 and A119, but with a front-facing camera that records in true 4K UHD.

VIOFO A129 Pro Image Quality and Recording Capabilities

The VIOFO A129 Pro Duo, which is equipped with an 8MP Sony Exmor R STARVIS image sensor, captures clear, vibrant colors with adequate detail in 4K UHD in the front and Full HD in the rear camera in all lighting conditions.

If you only use the front camera, your resolution options are 4K at 30FPS or 2K at 60FPS. You can also scale it down to 1080 Full HD at 60 or 120 frames per second. However, if you use both the front and rear cameras simultaneously, video recording in the front camera is limited to 30 frames per second. The front camera captures at 130° and the rear camera at 140°, ensuring that nothing is missed, day or night.

Does the A129 Pro Have Parking Modes?

The VIOFO A129 Pro Duo protects your car by recording videos when it detects movement or impact, even when you are not present. The buffered recording includes the few seconds before and after the triggered event, giving you the full picture. To enable this feature, you will need a 3-wire Hardwiring cable or an external battery pack (such as the BlackboxMyCar PowerCell 8).

Is the A129 Pro GPS-Enabled?

This VIOFO A129 Pro Duo includes an external GPS module. You can use GPS to record your speed and route data in your video footage files. The GPS will also sync the A129 Pro's clock with the GPS time, allowing your video files to be properly time-stamped.

Does the A129 Pro Have Wi-Fi Connectivity?

Unlike other dashcams, this allows you to watch videos without having to remove the memory card from the device. The 2" screen, or the built-in dual-band WiFi dash cam, and the additional 5GHz frequency on the VIOFO A129 Pro Duo allows you to connect with the VIOFO App to control dash cam settings and access footage clips on the fly.

Is the VIOFO A129 Pro Heat Resistant?

In hot weather, 4K dash cams are more prone to overheating, especially when used in parking mode inside a roasting car in the middle of summer. As previously stated, the VIOFO A129 Pro Duo includes an integrated cooling system. The A129 Pro has an operating temperature range of -10 to 65 degrees Celsius, making it suitable for hot southern summer days.

Review: Vantrue X4S Duo

What is the Vantrue X4S 4K Dash Cam's Resolution?

Competing with the VIOFO A129 Pro Duo's 4K capabilities, Vantrue released the XS4 Duo in late 2021. With dual DSP (front OmniVision and rear Sony sensor), the X4S duo captures both front and rear images simultaneously in 4k+1080P@30fps on its front camera and 1440P+1080P@30fps at the rear, recording more details and making license plate reading a breeze.

Does the X4S UHD have Night Vision?

The front and back cameras, when combined with the front F1.7 and rear F2.0 apertures, automatically adapt the exposure to the external environment and provide better night vision even in low light.

Does the X4S have Parking Modes?

With three parking detection modes to choose from, the X4S protects your car for up to 24 hours daily. Activating its time-lapse function, it will automatically take photos at predetermined intervals and combine them into a video clip, saving you a lot of space on your memory card. Furthermore, when the built-in gravity sensor detects a sudden collision while parked or driving, this Vantrue automatically records and locks the file to prevent the most crucial video from being overwritten.

Does this dash cam have GPS?

Vantrue also offers an optional GPS mount that lets you view the dashcam's live speed while driving. It also tracks the exact driving route, speed, and location on Google Maps using the Vantrue GPS player or WiFi APP.

If you wish to playback footage, the dash cam's 3" IPS screen makes it simple to access recorded videos and photos and change settings. The 2.4GHz and 5GHz WiFi options are also designed to avoid wireless interruption, allowing you to download and transfer data more steadily and quickly.

The X4S can also withstand extreme temperatures ranging from -4° to 158°F. It can also support external memory capacities of up to 512GB, allowing you to record and capture hours of video in a loop.


Vantrue X4S

Resolution (F+R)

4K UHD @ 30 FPS + Full HD 1080p @ 30 FPS

4K UHD @ 30 FPS + Full HD 1080p @ 30 FPS

Image Sensor

Sony Exmor


Parking Mode






Wide-Angle View

130° + 140°

131° + 131°




Operating Temperature

-10°C - 65°C

-20°C - 70°C

Loop Recording



Maximum SD Card



LCD Screen

2" High-Definition LCD

3'' IPS Screen










Special Features

8 MP Sony Exmor, Heat Resistant, Optional Circular Polarized Lens, Loop Recording, G-Sensor, Buffered Parking Mode, Built-in 5GHz WiFi with VIOFO APP, 4K Resolution, Optional GPS, Easy Installation with Windshield Static Stickers

4K Resolution, Loop Recording, G-Sensor, Built-in 5GHz WiFi with Vantrue APP, Optional GPS

Which is the better 4K UHD dash cam? VIOFO A129 Pro Duo or Vantrue X4S?

The X4S Duo is a good contender for the VIOFO A129 Pro Duo. Its 4K capability is good for capturing videos, although some users complain that they cannot maximize the dash cam usage due to non-camera issues.

Despite the fact that it is newer than the A129 Pro, users have been vocal about it, particularly regarding installation issues. Some X4S owners complain about the suction sticking to the windshield, and the camera tends to fall off while driving, especially in hotter climates. Many iOS users are also dissatisfied with the Vantrue app, which renders the videos inaccessible for playback.

On the other hand, the VIOFO A129 Pro Duo has earned great feedback for its capabilities and performance. In terms of capturing images, the 8MP Sony Exmor sensors capture a cinematic view even in dark conditions - whether for evidence or for recording your travels. In case you want to watch the videos, you can easily access the videos through the screen or the highly-responsive VIOFO app. The dual-band Wi-Fi of the A129 Pro also makes it win the competition. Installation is also a breeze with the new Static Windshield Stickers that VIOFO includes in every purchase of their dash cams.