Robotic pool cleaners are the most advanced and environmentally safe pool cleaning system you can purchase. Not only do they deliver a sparking clean look to your pool by wiping the floor and wall clean of all debris, but they also serve as independent filtration systems by getting rid of tiny allergens and excess/unmixed chemicals from the pool water. The best thing about a modern robotic pool cleaner is the fact that you can simply drop it into the pool and the robot will do everything by itself, without leeching off your pool filtration system or pool pump.
Although robot cleaners are relatively expensive, in the long run they save you a lot of time, which in my opinion is worth every penny. Nobody on their death bed wishes they spent more time cleaning their pool. Time is our most valuable resource.