Casa Leo Leo's Loo Too Review

Leo's Loo Too specs

• Casa Leo doesn't publish the entry size; Tom's Guide calls it the smallest opening of the four boxes it tested.
• Dimensions (24 × 22 × 27.6 in) come from the Amazon listing title. Some listings show the older Smarty Pear brand name.
• The 1 lb detection threshold is low, which helps with small cats, but no sensor makes an unsupervised young kitten risk-free.

Running costs: with our defaults, consumables for one cat come to about $4.30 a month plus litter. See the full breakdown in the cost calculator.

Specs are compiled from manufacturer pages, Amazon listings and independent reviews and can change between production runs. Confirm the weight range and what's in the box on the Amazon page before buying.

We haven’t tested Leo’s Loo Too ourselves. This review draws on WIRED, which named it a top pick for a long time, and on Tom’s Guide, which tested it against the Litter-Robot 4, Neakasa M1 and ELS PET Orbitie. Specs come from Casa Leo (also sold as Smarty Pear) and the Amazon listing.

Leo’s Loo Too is a compact front-entry drum with radar, four weight sensors, an anti-pinch sensor and UV-C odor control. Its small barrel is both its strength and its weakness. Tom’s Guide found it contained litter scatter best of the four boxes it tested, but WIRED’s 12-lb cat found it tight. It costs about $600. Tom’s Guide’s April 2025 price box showed $599 at Amazon, and WIRED lists it at $600. Check the price before you buy.

Who it’s for (and who should skip it)

It’s for small apartments with small or medium cats, where litter on the floor is the main complaint. It also has the lowest detection threshold we’ve found, and it works with Alexa and Google Assistant.

Skip it if your cat is over about 12 lb or picky about space. WIRED’s 12-lb cat found the barrel tight, and Tom’s Guide’s cats used it about a third as often as the Litter-Robot 4. Skip it on value, too: at about $600 it costs as much as the Litter-Robot EVO, which has a bigger entry and Whisker’s support behind it. If scatter is your main concern and you can spend less, the PETKIT PuraMax 2 is enclosed too, for about $390.

How it cleans, and how safe it is

According to Casa Leo and WIRED, four weight sensors, an anti-pinch sensor and radar that detects anyone near the box before a cycle work together. WIRED says it needs only 1 lb on its sensors to detect a cat. That’s a meaningful safety margin for small cats, and the radar adds a check before the drum moves.

Whether the entrance stays open through the whole cycle is not confirmed. Neither Casa Leo nor a named review in our sources says so. The anti-pinch sensor addresses some of the same risk, but it’s not the same as a confirmed open entry.

Casa Leo rates the drum from 1 lb. Even so, keep automatic cleaning off and supervise small kittens. A low threshold helps, but no sensor makes an unsupervised young kitten risk-free. Check your cat’s weight, age and length with the cat safety checker, and see best self-cleaning litter box for kittens.

Living with it

Fit and cat acceptance

Casa Leo doesn’t publish the entry size. Tom’s Guide calls it the smallest opening of the four boxes it tested, and WIRED found the barrel cramped for a 12-lb cat. In Tom’s Guide’s week-long count, the Litter-Robot 4 got almost three times as many visits. If your cat hesitates, follow our transition guide and keep the old box out longer.

Litter and refilling

It uses clumping litter. Both WIRED and Tom’s Guide found it hard to pour new litter through the small opening, so expect refills to take some care.

Emptying and odor

The 9.5 L drawer is sealed, and a UV-C light adds odor control. WIRED’s tester got a drawer-full alert about once a week. Consumables are Casa Leo liners and charcoal air-freshener bags, or generic liners. For more on keeping smells down, see self-cleaning litter box odor fixes.

Noise and size

Casa Leo claims about 30 dB for the motor. The Amazon listing title gives about 24 × 22 × 27.6 in. Some listings still show the older Smarty Pear brand name, so don’t be thrown if the seller name differs.

Running costs

Leo’s Loo Too takes Casa Leo liners or generic ones. Our cost model uses Whisker’s $1-per-liner price as a stand-in at about one bag per cat per week, plus Dr. Elsey’s Ultra at $22.99 for 40 lb from Chewy, at 10 lb per cat per month.

That’s about $10 a month, or roughly $121 a year, for one cat. Over five years, with the box at $599, we estimate about $1,202 for one cat and about $1,805 for two. Running costs are moderate. The purchase price is what makes this box expensive. Try your own numbers in the cost calculator.

What you’ll need beyond the box

• Litter: Dr. Elsey’s Ultra unscented, 40 lb.
• Liners: Casa Leo’s own liners or generic drawstring bags. We don’t list a specific liner because we couldn’t confirm a fit.
• Mat: a Gorilla Grip 35 × 23 in mat. The enclosed barrel contains most scatter, so a standard-size mat should do.

Bottom line

Leo’s Loo Too has reassuring sensing: radar, four weight sensors, anti-pinch protection and a 1 lb detection threshold. Tom’s Guide found it best at keeping litter in. The trade-offs are a cramped barrel that bigger cats avoid, fiddly refilling, and a price that matches roomier boxes. Buy it only if floor space and scatter matter more than headroom.

For most homes, the EVO or the PuraMax 2 is the better buy. Compare more options in Litter-Robot alternatives, use the litter box matcher, or check the Leo’s Loo Too price.

Featured in our guides

• The Quietest Self-Cleaning Litter Box: Noise Claims, Mechanisms and Picks

Sources

• amazon.com
• smartypear.com
• wired.com
• tomsguide.com