It means we approve of the unit. In order for a unit to be "Pool Nerd Approved", it must pass a series of qualities needed in a robotic pool cleaner. This includeds a great warranty, superior cleaning power, is the top of their class for their respective type of pool, and so much more.
We are glad you asked! Read our list of Top 5 Robotic Pool Cleaners here
The best two robotic pool cleaners for in-ground pools would be the Dolphin Premier and Dolphin Sigma. While the best robotic pool cleaner for above ground pools is the Dolphin Escape.
While we have tested nearly all of the top robotic pool cleaners, we haven't gotten around to them all. If you would like us to look into testing a specific unit or want a recommendation, please feel free to contact us and we would be happy to help!