Which is better for a multi-cat home?

The Purobot Max Pro 2 tracks up to 15 cats individually with facial recognition and weight sensing. The Litter-Robot 4 supports up to 4 cats. Past 4 cats, the Purobot is the only option of the two.

Which lasts longer between emptyings?

The Purobot's 8L sealed bin runs up to 17 days for one cat. The Litter-Robot 4 drawer runs up to 8 days. The gap narrows in multi-cat homes.

Is the Purobot worth the extra over the Litter-Robot 4?

Only if you want camera monitoring and per-cat health data. The Purobot's lowest recent price was $494.99 on 2026-10-31. Compare that to the Litter-Robot 4's current price before deciding.

The Purobot is rated at 35 dB, but owners report loud squealing during cleaning that scares some cats. The Litter-Robot 4 has no stated noise figure, and owners describe it as quiet.

Do I need a subscription for either?

Only the Purobot. Its camera playback needs a paid plan after a 30-day free trial. The Litter-Robot 4 has no camera and no playback subscription.

Which suits a large or senior cat?

The Litter-Robot 4 has a 15.75 in globe opening and a 6.9 in step. The Purobot has a 10.03 in entrance height and a low threshold, which helps short-legged cats but gives less room inside.

Purobot Max Pro 2 Automatic Cat Litter Box (Fence 2.0 Included) vs Litter-Robot 4 Automatic Self-Cleaning Litter Box

Buy the Litter-Robot 4 for most households: it handles up to 4 cats, has a proven sifting design, and rates 4.9 from 348 ratings. Buy the Purobot Max Pro 2 if you want per-cat health tracking, a camera, and a sealed 8L bin that lasts up to 17 days for one cat. On price, the Purobot's lowest recent daily price was $494.99 (2026-10-31) against a high of $899.99 (2026-10-30); no current Litter-Robot 4 price was given here, so check its live price before deciding.

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