Robot Vacuum Buying Guide: Features Explained in Plain English

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A good robot vacuum can keep floors tidy with almost no effort, but the spec sheets are full of jargon. Here is what the main features mean and which ones are worth paying for depending on your home.

Navigation: random vs mapped

Budget models often move in a semi-random pattern. They work, but take longer and can miss spots. Mid-range and premium models use LiDAR or camera-based navigation to build a map of your home. Mapping lets you choose which rooms to clean, set no-go zones and resume cleaning after recharging. For homes with more than two rooms, mapping is the single biggest upgrade.

Suction power

Suction is usually quoted in pascals (Pa). Higher numbers help with carpets and pet hair, but brush design matters just as much. Rubber brushes tangle less with long hair than bristle brushes.

Self-emptying base

A self-emptying dock sucks dirt from the robot into a larger bag, so you only empty it every few weeks. It adds cost and takes floor space, but it is very convenient if you have pets or want truly hands-off cleaning. Factor in the ongoing cost of replacement bags.

Mopping

Many robots now include a mop. Basic versions drag a damp pad; better ones vibrate or rotate the pad and lift it on carpets. If you have mostly hard floors, a good mopping system is worth considering. If you have mostly carpet, prioritise suction instead.

Height and obstacle avoidance

Measure the gap under your sofa and bed – some robots are too tall to fit. Obstacle avoidance helps the robot steer around cables, socks and pet accidents, which is a real benefit in busy homes.

App and battery

A reliable app makes scheduling easy. Battery life of 90+ minutes is enough for most apartments; larger homes benefit from models that recharge and resume automatically.