If you're deciding between the Litter-Robot EVO and Litter-Robot 5, the right choice largely comes down to the number of cats in your home, the space available, and the level of monitoring and automation you want.
The Litter-Robot EVO is designed for one or two cats and smaller living spaces, while the Litter-Robot 5 offers more room, support for up to five cats, and an upgraded monitoring feature set that includes WasteID™ and per-cat tracking.
This guide compares the Litter-Robot EVO, Litter-Robot 5, and Litter-Robot 4 side by side to help you choose the model that best fits your household and needs.
Litter-Robot EVO vs Litter-Robot 5: Key Differences
The Litter-Robot EVO and Litter-Robot 5 share the same core self-cleaning functionality, app connectivity, and SmartScale® technology. Both are designed to reduce litter box maintenance while providing insights into your cat's usage habits through the Whisker app.
The main differences are size, capacity, and advanced monitoring features. The EVO supports up to two cats and has the most compact footprint, while the Litter-Robot 5 supports up to five cats and offers a larger interior with additional headroom and a wider entryway.
Compared with the Litter-Robot EVO, the Litter-Robot 5 offers an upgraded monitoring feature set that includes WasteID™, PetTag identification, per-cat SmartScale® tracking, and 7-day offline data storage. The comparison below explores these differences in more detail.
Litter-Robot EVO: Simple, Compact, and Connected
The Litter-Robot EVO is designed for households with one to two cats. It supports cats from 3 to 19 lb and has a smaller footprint than the Litter-Robot 5, making it easier to place in apartments, condos, bathrooms, laundry rooms, or smaller living spaces.
After each visit, the globe rotates to separate waste from clean litter and deposits clumps into a sealed waste drawer with a Carbon Filter. The QuietSift® cycle runs quietly, helping reduce disruption for both cats and people.
The EVO connects to the Whisker app, allowing owners to monitor usage, receive drawer alerts, and control cycles remotely. It also includes SmartScale® weight tracking and a full-colour LCD for simple setup and daily status updates.
Litter-Robot 5: Advanced Monitoring and Expanded Capacity
The Litter-Robot 5 is designed for households with up to five cats and supports cats from 3 to 30 lb. It has a larger interior, more headroom, and a wider entryway than the EVO.
Its key feature is WasteID™, which identifies whether the cat left urine or solid waste. The unit then adjusts its cycle timing to help manage odour more effectively. Solid waste can trigger a faster cycle, while urine cycles allow time for clumps to form properly before sifting.
The Litter-Robot 5 also connects to the Whisker app and supports per-cat SmartScale® tracking based on each cat's individual weight. This gives owners a more detailed view of litter box habits and can help them notice changes in routine over time.
Litter-Robot EVO vs Litter-Robot 5: Side-by-Side Comparison
| Spec | Litter-Robot EVO | Litter-Robot 5 | Litter-Robot 4 |
|---|---|---|---|
 |
 |
 |
|
| Number of cats | 1–2 cats | Up to 5 cats | Up to 4 cats of any breed or size |
| Cat weight range | 3–19 lb | 3–30 lb | 3+ lb |
| Size | Most compact footprint | Larger interior, more headroom, wider entryway | Same footprint as a traditional large litter pan |
| WasteID™ | — | Yes | — |
| PetTag identification | — | Yes | — |
| SmartScale® | SmartScale® weight tracking | Per-cat SmartScale® tracking | SmartScale® weight tracking |
| Offline data storage | — | 7-day offline data storage | — |
| Whisker app | Yes | Yes | Yes |
Frequently Asked Questions About the Litter-Robot EVO and Litter-Robot 5
Which features are exclusive to the Litter-Robot 5?
Compared with the Litter-Robot EVO, the Litter-Robot 5 offers an upgraded monitoring feature set that includes WasteID™, PetTag identification, per-cat SmartScale® tracking, and 7-day offline data storage. It also offers a larger interior, a wider entryway, and support for more cats.
Is the Litter-Robot EVO suitable for multi-cat homes?
Yes. The Litter-Robot EVO supports up to two cats. For households with three or more cats, the Litter-Robot 5 offers greater capacity and a larger interior.
Which model is more suitable for large cats?
The Litter-Robot 5 supports cats up to 30 lb and offers more interior space, additional headroom, and a wider entryway.
Which model is more suitable for apartments and smaller spaces?
The Litter-Robot EVO has the most compact footprint, making it easier to place in apartments, condos, bathrooms, laundry rooms, and other smaller living spaces.
Can kittens use these models?
Both models support cats from 3 lb. For very small kittens, follow the manufacturer’s safety and setup guidance.
What does WasteID™ do?
WasteID™ identifies whether the cat left urine or solid waste and adjusts cycle timing to help with odor control and routine monitoring.
Ready to Choose Your New Litter-Robot Model?
Whether you're looking for a compact self-cleaning litter box or advanced monitoring features for a multi-cat household, both the Litter-Robot EVO and Litter-Robot 5 offer a connected approach to litter box maintenance. The Litter-Robot 4 remains a useful reference point for customers comparing the latest models against an established previous-generation option.
Once you've selected the model that best fits your household, you can personalize your setup with available colour options, model-specific accessories, and extended warranty coverage options.
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