What's the difference between a 3-channel and a 360° (4-channel) dash cam?

A 3-channel cam records three views, typically front, cabin (inside), and rear, which is the common setup for rideshare drivers and families. A 360° system usually adds a fourth camera (left/right or a dedicated side view) to approach all-around coverage. More channels means more wiring, more storage demand, and often lower per-channel resolution at a given price.