Rotating drum~$600Casa Leo
Smarty Pear's drum now sells under the Casa Leo name, and it is strict about litter: 100% clay clumping only, with anything else voiding the warranty. It adds a UV-C lamp and Alexa and Google Assistant hooks to the usual four weight sensors, radar and anti-pinch protection. The maker quotes about 30 dB, the lowest noise claim in the catalog, but publishes no dimensions or drawer size.
Approx. price
~$600
maker's store, not a live price
20 lb
Best for: Light sleepers with one cat under 20 lb and a clay-litter habit
Casa Leo publishes neither the lightest cat this box detects nor a minimum age. Until it does, treat it as unsuitable for automatic cleaning around a kitten and run it by hand.
Detection: weight, infrared / radar. The maker states anti-pinch protection on the moving part, by sensor or by design.
How minimum weights work, and what to do below themThe maker publishes no drawer volume, so the days cannot be worked out.
The two lists above are drawn from the maker’s own pages, manuals and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.
The Leo's Loo Too draws a small but consistent group of owners, most of them people who came from an older Litter-Robot. They praise the same things: it runs reliably, it is quieter and quicker to cycle than the LR3, cats take to it quickly, and some litters that stuck in a Litter-Robot do not stick here.
The trade-offs are about size and cleaning. The globe and opening are smaller than a Litter-Robot's, so owners of big cats doubt the 20 lb rating. There is no automatic litter dump, so a full change means lifting and tipping the globe, and the entry step is high enough that owners add their own. One owner found urine and litter collecting in crevices and gave it up rather than dismantle it weekly.
Think of it for one or two small to medium cats and an owner who values a quiet cycle and is happy to use 100% clay clumping litter, the only litter the warranty covers. Owners of large cats or of messy cats tend to prefer the roomier Litter-Robot 4 or an open-top design.
It is rated to 20 lb, but owners describe the interior and opening as smaller than a Litter-Robot's. One thought cats over about 15 lb would find it tight.
There is no empty-litter cycle, so owners remove the globe and tip the litter out by hand. It is the feature owners who also have a Litter-Robot miss most.
Owners say it sits in a compartment under the waste drawer, and it is not obvious; Casa Leo's own video shows the location.
Owners find the weight-based identification unreliable when cats are close in weight; one could not separate two cats four pounds apart.
Rotating drum
Best for: Large multi-cat households that want camera tracking without a required plan
Rotating drum
Best for: One or two average-size cats in an apartment
Rotating drum
Best for: Up to five cats, with a camera, for well under Litter-Robot 5 Pro money