Is a 4K dash cam worth it over 1080p?

For evidence quality, yes. 4K records four times the pixels of 1080p, which is the difference between a readable license plate and a blur when you crop in on an incident. The advantage is biggest at distance, at night and with fast-moving traffic.

Which VIOFO 4K dash cam should I choose?

A229 Pro: best-value 4K front + 2K rear dual setup. A329S: flagship 4K 60fps with Wi-Fi 6 and SSD support. A229 Ultra: true 4K on both front and rear cameras. Pick a Telephoto (T) edition for long-range plate capture, or a Waterproof (W) edition for trucks, pickups and motorcycles.

How much storage does 4K recording use?

Roughly 20-30 GB per hour at high bitrate, so a 256 GB microSD card holds about 8-12 hours of loop recording. The A329 series also supports external SSDs up to 4 TB for multi-day parking and road footage.

Do 4K dash cams record well at night?

VIOFO's current-generation 4K models — the A139 Pro, A229 and A329 series — use Sony STARVIS 2 sensors designed for low light, plus HDR to balance headlight glare against dark streets. Resolution alone doesn't guarantee night quality - the sensor does most of the work, so check the sensor generation when comparing 4K dash cams.