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
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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 has a small owner base. The happiest two praise the same things: it runs reliably, one found it quieter and quicker to cycle than the Litter-Robot 3 it replaced, cats can take to it at once, and that owner's litter stopped sticking to the walls.
The trade-offs are about size, cleaning and, in one case, safety. The globe and opening are smaller than a Litter-Robot's, so one owner doubts the 20 lb rating and another worried about an 18 lb cat. There is no automatic litter dump, so a full change means lifting and tipping the globe, and the entry step is high. Three owners describe smell building up, one of whom gave it up rather than dismantle it weekly. One owner returned theirs within a week after it twice kept rotating with the cats' heads inside.
Think of it for one or two small to medium cats and an owner who values a quiet cycle and does not mind tipping the globe for a full change. The owner who returned it and another who gave it up both looked to a Litter-Robot next.
It is rated to 20 lb, but one owner describes the interior and opening as smaller than a Litter-Robot's and thought cats over about 15 lb would find it tight. Another owner worried about an 18 lb cat that stretches out to go.
There is no empty-litter cycle, so the globe has to come out and be tipped by hand. One owner calls it a painful process, and one shopper picked a Litter-Robot 4 instead because it dumps the litter itself.
It sits in a compartment under the waste drawer, and it is not obvious: one owner of a year and a half could not find it, and another owner answered with a video showing the spot.
Two owners found the weight readings too inconsistent to tell which cat went; 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
Check price on Amazon
Rotating drum
Best for: One or two average-size cats in an apartment
Check price on Amazon
Rotating drum
Best for: Up to five cats, with a camera, for well under Litter-Robot 5 Pro money