I’ve owned both. Run them side by side in my apartment for six weeks, with Miso and his brother rotating between them. This is the comparison I wish existed when I was trying to decide — no manufacturer spec padding, just what actually differs in daily use.
Spoiler: they’re closer than the $280 price gap suggests. But the differences that exist are real, and they matter for specific situations.
Price: The Elephant in the Room
Leo’s Loo Too: $400–$450 depending on sales. Litter-Robot 4: $699. That’s a $250–$300 difference — enough to matter for most people. The Leo’s Loo Too regularly goes on sale; I’ve seen it as low as $369. The Litter-Robot 4 occasionally dips to $599 but rarely lower.
If this were a clear performance gap, the Litter-Robot would be an obvious choice. It isn’t. So that price difference becomes the central question of this comparison.
Side-by-Side Specs
| Feature | Leo’s Loo Too | Litter-Robot 4 |
|---|---|---|
| Price | ~$420 | ~$699 |
| Globe entry opening | ~9 in | 10.25 in |
| Weight limit | ~25 lbs | 20+ lbs |
| Waste drawer capacity | Medium | ⭐ Largest in class |
| Odor control method | Active spray + carbon | OdorTrap + carbon |
| App quality | ⭐ Excellent (PETKIT) | Good (Whisker) |
| Per-cat usage tracking | ✅ Yes | ✅ Yes |
| Liner bag system | ❌ Direct dump | ✅ Yes |
| Ongoing consumables | Deodorizer ~$12/mo | Carbon filters only |
| US-based support | ⚠️ Hit or miss | ✅ Established |
| Build quality feel | Good | ⭐ Premium |
Cleaning Performance: Basically a Tie
Both boxes use a globe rotation to sift clumps into a waste drawer. Both cycle within minutes of your cat leaving. Both handle clumping clay litter well. In six weeks of running them side by side I couldn’t tell a meaningful difference in how clean the litter stayed day to day.
The Litter-Robot 4 is quieter — marginally. The Leo’s Loo Too’s rotation is smooth but produces slightly more mechanical sound. Neither is loud enough to bother a sleeping cat once they’ve adjusted, but the Litter-Robot is the quieter of the two.
Odor Control: Leo’s Loo Too Wins Short-Term
The active deodorizer spray on the Leo’s Loo Too gives it a genuine edge in day-to-day smell management. After each cycle it sprays a neutralising agent into the globe — you can actually notice the difference versus not using it. In a small bathroom or apartment this matters.
The Litter-Robot 4’s OdorTrap system — sealed drawer plus carbon filter — is excellent but passive. It contains smell rather than actively neutralising it. For most single-cat households both are fine. Where the Leo’s Loo Too pulls ahead is that first week before you’ve emptied the drawer.
The catch: the Leo’s Loo Too deodorizer cartridge costs about $12/month. Over a year that’s $144 more than the Litter-Robot’s filter-only running costs. Factor that in.
App: Leo’s Loo Too Has the Edge
The PETKIT app is more feature-rich than the Whisker app right now. Litter depletion tracking, more granular health alerts, a cleaner interface. The Whisker app has had reliability complaints in reviews — connectivity drops, notifications not firing — that I experienced occasionally during testing. The PETKIT app was more consistent.
Both track per-cat usage by weight. Both send alerts for abnormal visits. For health monitoring both are genuinely useful. But if you’re the kind of person who actually lives in the app, PETKIT’s is the better experience right now.
Waste Capacity: Litter-Robot 4 Wins for Multiple Cats
This is where the Litter-Robot 4 earns its price for multi-cat households. The waste drawer is significantly larger. With two cats I empty it every 7–10 days. The Leo’s Loo Too’s drawer needs attention every 4–5 days with the same two cats.
For one cat the difference is less important — both are manageable. For three or more cats the Litter-Robot 4’s capacity advantage becomes the deciding factor.
Build Quality and Support: Litter-Robot Wins
The Litter-Robot 4 feels more premium. Thicker plastic, more refined internals, a liner bag system that makes emptying fast and clean. Whisker has been making these boxes for years — the engineering refinement shows.
More importantly, Whisker’s US-based support is established and responsive. PETKIT’s support has improved but warranty claims can still be slow. If long-term reliability and support matter to you, the Litter-Robot is the safer investment.
Who Should Buy Which
Buy the Leo’s Loo Too if: you have one or two cats, you want the best app experience, odor control is a priority, or your budget is under $500. You’re getting 90% of the Litter-Robot’s performance for significantly less money.
Buy the Litter-Robot 4 if: you have three or more cats (drawer capacity matters), you want the most reliable product with the best support, or you simply want to buy once and never think about it again. The build quality and Whisker’s track record justify the premium for these use cases.
Verdict
For most single and dual-cat households the Leo’s Loo Too is the smarter buy. The $280 price gap is real and the performance gap isn’t. But for multi-cat homes and anyone who wants the most reliable long-term option — the Litter-Robot 4 earns its price tag.
