Whisker
Litter-Robot 4
$699
Released 2022
Best Self Cleaning Litter Boxes · head-to-head
Litter-Robot 4 vs Leo's Loo Too
A sourced, side-by-side comparison. Leo's Loo Too is cheaper at $599.99. Every spec and price links to its source.
Casa Leo
Leo's Loo Too
$599.99Cheaper
Released 2021
Which is better: the Litter-Robot 4 or Leo's Loo Too?
On the specs we track, they're closely matched. The Leo's Loo Too is the cheaper at $599.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Litter-Robot 4 | Leo's Loo Too |
|---|---|---|
| US price | $699 | $599.99 |
| Brand | Whisker | Casa Leo |
| Released | 2022 | 2021 |
| Mechanism | rotating | rotating |
| Capacity cats | 4 | 4 |
| Waste drawer capacity | 8–13 gal liner (approx. 30–49 L) | 9.5 L |
| App connectivity | Yes | Yes |
| Weight sensor | Yes | Yes |
| Litter type | clumping | clumping |
| Dimensions (in) | 22 x 27 x 29.5 in | 24 x 22 x 27.6 in |
| Release | 2022 | 2021 |
Sources — Litter-Robot 4: whisker.com (verified 2026-06-19). Leo's Loo Too: casaleopet.com (verified 2026-06-19).
What's the difference between the Litter-Robot 4 and Leo's Loo Too?
Where the two actually differ on the specs we track (2 of 7). Matching specs are omitted.
- Waste drawer capacity: Litter-Robot 4 8–13 gal liner (approx. 30–49 L) vs Leo's Loo Too 9.5 L
- Dimensions (in): Litter-Robot 4 22 x 27 x 29.5 in vs Leo's Loo Too 24 x 22 x 27.6 in
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Litter-Robot 4
Two whitelisted hands-on testers (Engadget, USA Today's Reviewed) rate the Litter-Robot 4 the best self-cleaning litter box despite its ~$699 price. Both praise near-silent operation and the companion app; both flag cat-sensor quirks and the high price. Engadget flags litter tracking; Reviewed flags the short one-year warranty and ongoing odor-filter replacement cost. All six quotes were verified as literal substrings of the fetched review text. (2 sourced reviews, 2 lab-tested.)
Praised: Near-silent operation; Helpful app with litter/waste alerts and cat activity + weight tracking; Strong odor control, no detectable smell.
Flagged: Very high ~$699 price; Cat-detection sensor faults / reliability quirks; Litter gets tracked onto the floor (open design).
Leo's Loo Too
Two whitelisted testers covered this exact model. Engadget lived with the Casa Leo Loo Too for a month; Tom's Guide app-tracked Leo's Loo Too against three rival robot boxes. Both praise the companion app's per-cat weight tracking and usage alerts. Engadget flags the steep ~$650 price and an extremely short power cord; Tom's Guide flags a cramped interior, the smallest waste bin of the group, and difficulty refilling litter. NBC, Reviewed's roundup and blogs were excluded as non-qualifying. (2 sourced reviews, 1 lab-tested.)
Praised: Per-cat weight tracking and usage alerts through the companion app; Strong odor control — reviewer says it never, ever smells; Contains litter scatter the best and keeps the surrounding area cleanest.
Flagged: Steep price, roughly $650; Cramped, small interior and tiny opening can deter or apprehend larger cats; Smallest waste bin of the compared boxes, so more frequent emptying.