Litter-Robot 5 vs Litter-Robot 4: Which Should You Buy?
Litter-Robot 5 is the better choice for most new buyers. It keeps the familiar Litter-Robot design but adds more useful capacity, a deeper waste drawer, WasteID and a broader supported cat range.
Litter-Robot 4 is still the better value when it is meaningfully cheaper. If you already own LR4 and it fits your cats well, the new generation alone is usually not enough reason to replace it.
Litter-Robot 5 wins overall
For a new purchase, LR5 is the stronger long-term choice because the upgrades improve the things owners notice every day: capacity, waste handling and tracking.
LR4 wins on value. It remains a good buy when the discount is large enough to matter.
Litter-Robot 5 vs 4 Comparison
| Feature | Litter-Robot 5 | Litter-Robot 4 | Winner |
|---|---|---|---|
| Generation | Current generation | Previous generation | LR5 |
| Supported cat range | 3–30 lb | Narrower older range | LR5 |
| Household size | Up to 5 cats | Up to 4 cats | LR5 |
| Entry opening | 15.75 × 15.75 in | 15.75 × 15.75 in | Tie |
| Interior room | More vertical headroom | Slightly less headroom | LR5 |
| Waste drawer | Deeper drawer | Smaller drawer | LR5 |
| Waste tracking | WasteID | No WasteID | LR5 |
| Display | LCD display | Control panel + app | LR5 |
| App monitoring | Yes | Yes | Tie |
| Value when discounted | Higher upfront cost | Often stronger value | LR4 |
What Actually Changed?
That is why LR5 is easier to recommend for a new purchase than as an automatic replacement for a working LR4.
Litter-Robot 5
Litter-Robot 5 is the version we would choose first for a new purchase. The added capacity is especially useful in multi-cat homes, while WasteID, the newer display and the broader supported cat range make it the stronger long-term buy.
- You are buying new
- You have several cats
- You have a very large cat
- You want the current Whisker generation
- You plan to keep the unit for years
- Your LR4 already works well
- LR4 is heavily discounted
- You do not need the extra capacity
- You want a more open design for a cautious cat
Litter-Robot 4
LR4 remains a very good automatic litter box. Its biggest advantage now is simple: if it costs much less than LR5, you can still get the mature Litter-Robot experience without paying for features you may not need.
- You want better value
- You have one to four cats
- You prefer a mature platform
- You do not need WasteID
- The price is close to LR5
- You have five cats
- You need the newer capacity improvements
- You want the latest Whisker generation
Which One Should You Buy?
Choose Litter-Robot 5
Best for a new long-term purchase, especially with several cats or when you want the current generation.
Choose Litter-Robot 4
Best when the savings are meaningful and one to four cats already fit LR4 comfortably.
Keep it unless the drawer size, cat count, cat size or newer tracking features solve a problem you actually have.
How These Two Fit Into the Current Litter-Robot Lineup
Litter-Robot 5 is now the default current-generation choice for most buyers, while LR4 stays relevant as the value option. If you want the camera-equipped premium model or the smaller EVO, see Litter-Robot Models Explained: 5 Pro, 5, EVO and 4.
If you are unsure whether an enclosed Litter-Robot is right for your cat at all, compare it with an open-top design in Open-Top vs Enclosed Automatic Litter Boxes.
For a broader buying decision, use Best Automatic Litter Boxes. For larger or busier households, see Best Automatic Litter Boxes for Large Cats and Best Automatic Litter Boxes for Multiple Cats.
Troubleshooting & Ownership Help
A good automatic litter box can still be frustrating if the litter, cleaning routine or transition is wrong. These guides solve the most common ownership problems.
Litter-Robot 5 vs 4 FAQ
Is Litter-Robot 5 better than Litter-Robot 4?
Is Litter-Robot 5 bigger than Litter-Robot 4?
Is Litter-Robot 5 better for multiple cats?
Should I upgrade from Litter-Robot 4 to Litter-Robot 5?
Is Litter-Robot 4 still worth buying?
Start With These 3 Main Litter Box Pages
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