Which is better for a two-cat home?

The EVO covers two cats and costs $303.99 at eBay as of November 5, 2026. Pick the Litter-Robot 4 only if either cat is over 19 lbs or you plan to add more cats.

Which handles more cats?

The Litter-Robot 4, at up to 4 cats and 3-25 lbs per cat. The EVO stops at 2 cats and 19 lbs.

Is the Litter-Robot 4 worth the extra money?

Only if you need the extra cat capacity, the 25 lb weight limit, or the extra day between empties. For one or two average cats, the EVO does the same core job for $395 less.

Which is better for a small apartment?

The EVO. Its footprint is about 20.6 x 24.3 in against 22 x 27 in for the Litter-Robot 4, and it has a slightly lower profile.

Which has the more trustworthy rating?

The Litter-Robot 4's 89/100 comes from 13,591 ratings; the EVO's 94/100 comes from 87. The EVO scores higher but on a much thinner sample.

Do both use the same app and cleaning method?

Yes. Both use the Whisker app for visits, weight tracking and status, and both sift waste with QuietSift after each use.

Litter-Robot 4 Beginner Bundle vs Litter-Robot EVO

Buy the Litter-Robot 4 Beginner Bundle if you have three or four cats, a cat over 19 lbs, or want the longest stretch between drawer empties. Buy the Litter-Robot EVO if you have one or two cats and a tight spot for the box. The EVO is far cheaper at $303.99 at eBay as of November 5, 2026, against $699.00 at Amazon for the Litter-Robot 4 bundle, but its 94 rating rests on only 87 ratings versus 13,591 for the Litter-Robot 4.

Today the Litter-Robot EVO costs $395.01 less at its best price.

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