ILIFE A4S is one of the cheapest on the market so far. Decent running time, nice design and a price of a little bit under $200 make it super attractive to buy. No wonder why this model has thousands of good reviews on Amazon. It also has one of the slimmest body that helps the robot to get "hard-to-reach" places. Along with a strong suction, A4S has two side brushes that sweep dirt from corners and the main bristle brush that work together transferring all the caught debris to its dustbin. HEPA filtration catches about 98% of all allergens in the air. All over its body, the robot has sensors that prevent it from falling as well as avoid bumping into furniture. ILIFE A4S does a good job on a bare floor picking everything from it. However, the machine cannot deep clean thick carpets, it only suitable for thin ones. It doesn't have an app so you are able to manage it only via its IR remote control. ILIFE A4S automatically dock itself when its battery runs out.
The manufacturer claims that the robot's main brush is tangle free but you probably still need to clean it once in a while from wrapped hair. The robot also does not clean medium and high-pile carpets as we mentioned before. It also gets stuck which is not an issue of ILIFE only, most of the robots stuck from time to time.
Overall, for the price ILIFE A4S is a decent robot cleaner that last long, look great and do its job well on thin carpets and bare floors.