You don't need to spend a lot to get video proof after an accident. Here's how three popular budget dash cams compare, including what their sales pages leave out.
Disclosure: this is an independent buyer's guide. If you buy through our links we may earn a commission at no extra cost to you. Only products marked with a store button are affiliate links; the others are listed for comparison. Always follow local laws on windshield mounting and recording.
Under $100, these are the features that actually matter when something happens on the road.
Locks the clip during a crash or hard braking so loop recording can't overwrite it.
Records bumps or motion while parked, but usually needs constant power or a hardwire kit.
A built-in screen lets you set it up without a phone. App-based cams have no screen but are easier to download clips from.
Resolution, field of view and max memory card size should be listed. Vague terms like "crystal-clear HD" are a warning sign.
Good to know: most dash cams need a high-endurance microSD card. Check whether one is included before you order.
We've reviewed RoadVision and DashOne Pro in full. 70mai M310 details come from its official website.
Image: 70mai| RoadVision | DashOne Pro | 70mai M310 | |
|---|---|---|---|
| Resolution | "HD" (photo suggests 1080p) | Not listed | 2K (2304 x 1296) |
| Field of view | 170° claimed (lens marked 130°) | 170° claimed | 130° |
| Screen | ✓ Built-in LCD | ✓ Built-in LCD | ✗ App only |
| G-sensor | ✓ Yes | ✓ Yes | ✓ Yes |
| Parking mode | ✓ Needs constant power | ✓ Needs constant power | Needs hardwire kit |
| Voice control | ✗ No | ✗ No | ✓ Yes |
| Price for one | $69.99 | $69.99 | About $33 (Amazon) |
| Best per-unit deal | $25.99 each (4-pack) | $25.99 each (4-pack) | Single unit |
| Returns | 30 days | 30 days | Depends on retailer |
RoadVision and DashOne Pro details come from our full reviews and their official order pages. 70mai M310 specs come from the official 70mai website; the price is a retailer listing at the time of writing.
RoadVision and DashOne Pro have a built-in screen, which is easier if you don't want another app. 70mai M310 is app-based and has voice control.
70mai lists 2K resolution and a 130° lens. RoadVision and DashOne Pro use vaguer terms, so expect typical budget quality.
Every parking mode needs power while the car is off. That means an outlet that stays on or a hardwire kit.
RoadVision and DashOne Pro drop to $25.99 each in the 4-pack, which makes sense for a family with several cars.
Use a high-endurance microSD card; regular cards wear out quickly with constant recording.
RoadVision and DashOne Pro allow 30-day returns, but change-of-mind returns must be unused and you pay return shipping.
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If you want a dash cam you can set up without an app, RoadVision covers the essentials: built-in screen, G-sensor, parking mode and a tool-free install, with the 4-pack bringing it to $25.99 per camera. DashOne Pro is a near-twin with 360° rotation. If you care most about sharp, clearly specified video, an app-based 2K cam like 70mai M310 is the better match.
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