Litter-Robot 5 is the best fit for most buyers. It adds WasteID, support for up to five cats from 3–30 lb, more interior room, a larger waste drawer and a full-color display without making cameras part of the purchase.
Litter-Robot EVO is the simpler current-generation choice for one or two cats and smaller homes. Litter-Robot 5 Pro is for owners who specifically want camera-based identification, while Litter-Robot 4 is now the mature previous-generation value option.
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Litter-Robot 5 is the lineup sweet spot
It gives multi-cat homes the biggest practical upgrades over LR4—WasteID, a broader 3–30 lb cat range, capacity for up to five cats, more interior space and a larger waste drawer—without charging for camera hardware many owners will never use.
Buy the 5 Pro only when live video and camera-based cat identification solve a real problem in your household.
Find Your Best Litter-Robot Fit
Start with cat count, cat size, available floor space and how much monitoring you actually want.
Choose Litter-Robot 5
Choose Litter-Robot 5 Pro
Choose Litter-Robot EVO
Choose Litter-Robot 4 only when the price makes sense
Current Litter-Robot Models Compared
| Model | Best for | Cats / weight | Key advantage | Main trade-off |
|---|---|---|---|---|
| Litter-Robot 5 | Best overall | Up to 5 cats 3–30 lb | WasteID, roomier interior, larger drawer, full-color display | Costs more than EVO and discounted LR4 |
| Litter-Robot 5 Pro | Camera monitoring | Up to 5 cats 3–30 lb | LR5 platform plus integrated dual cameras | Highest cost; some camera features require Whisker+ |
| Litter-Robot EVO | Small homes / 1–2 cats | Up to 2 cats 3–19 lb | Compact current-generation entry point | Lower capacity and narrower cat-size range |
| Litter-Robot 4 | Proven discount value | Up to 4 cats | Mature platform and support history | Previous generation; no WasteID |
The Models That Deserve Your Attention
Litter-Robot 5
The current-generation model most households should start with.
Litter-Robot 5 is Whisker’s mainstream current-generation model. It supports up to five cats from 3–30 lb and adds WasteID, which distinguishes urine from feces for targeted odor handling and richer routine monitoring.
Compared with LR4, Whisker also gives LR5 a slightly larger interior, improved waste distribution, a larger-capacity drawer and a full-color LCD.
Pros
- Up to five cats
- 3–30 lb operating range
- WasteID
- Larger interior and waste capacity than LR4
- Full-color LCD
Cons
- More expensive than EVO
- Large footprint remains
- Camera-based identification requires 5 Pro
Litter-Robot 5 Pro
Buy it for the cameras—not simply because it sits above LR5.
LR5 Pro shares the core LR5 platform: the same current-generation size, WasteID technology, five-cat capacity and 3–30 lb operating range. The reason to move up is its integrated dual-camera system.
Those cameras enable live streaming, recording and richer individual-cat identification. Whisker notes that some advanced features require Whisker+.
Pros
- All core LR5 improvements
- Dual AI-powered cameras
- Live viewing and recording
- Better individual-cat identification when weights overlap
Cons
- Highest purchase cost
- Indoor-camera privacy considerations
- Some advanced features require Whisker+
Litter-Robot EVO
The right current-generation model when smaller capacity is a feature, not a compromise.
EVO is Whisker’s compact current model. Whisker recommends it for up to two cats, and its manual lists a 3–19 lb operating range.
Its smaller household range is the key limitation. EVO should not be treated as a cheaper LR5 if your cat count or cat size already pushes beyond its intended use.
Pros
- Compact footprint
- Current-generation Whisker design
- Best fit for 1–2 cats
- 3–19 lb operating range
- Verified Amazon listing
Cons
- Not for three-plus-cat homes
- Narrower weight range than LR5
- Less expansion headroom
Litter-Robot 4
Still good—but now primarily a price-driven choice.
Litter-Robot 4 remains a mature, widely supported platform with strong app tracking, accessories and a large installed base. That still has value—but it should no longer be presented as an equal-generation alternative to LR5.
Choose LR4 when its real selling price is meaningfully below LR5.
Pros
- Mature ownership history
- Strong accessory ecosystem
- Verified Amazon availability
- Good buy when discounted
Cons
- Previous generation
- No WasteID
- Less household/cat-size headroom than LR5
Upgrade Paths: When Moving Up Actually Makes Sense
Strongest generational upgrade
Worth considering when you want quieter operation, newer sensing, WasteID, broader cat support and a more modern interface.
Upgrade only for specific problems
Move up when five-cat capacity, 3–30 lb support, WasteID, extra interior room or the larger drawer solves a real problem.
Only for camera identification
The Pro upgrade makes sense when similar-weight cats are difficult to distinguish and you genuinely want live or recorded video.
Lowest-friction first step
EVO is the cleanest entry point when you have one or two cats within its size range and limited floor space.
Ownership Issues to Check Before You Buy
Choose the right litter
Clumping quality affects cycling, residue and how often you need to clean the globe.
Best litter for automatic litter boxes →Plan for cleaning
Self-cleaning does not mean maintenance-free.
How often to clean an automatic litter box →Give nervous cats time
Do not force the transition.
Cat afraid of an automatic litter box? →Do not use automatic mode below the model’s supported minimum weight
Whisker advises supervised or semi-automatic use for kittens below the automatic-mode minimum. Follow the model-specific manual.