Litter-Robot 4 and Litter-Robot 3 both are high-end robot vacuums with advanced cleaning technology. Litter-Robot 4 is the newer model and introduces advanced safety features, a larger entry, and improved odor control. The Litter-Robot 3 remains a reliable option with proven performance and a more budget-friendly price. This comparison will help you quickly understand the differences and decide which one is the better fit for you.
Feature-by-Feature Breakdown
Wider Entry Opening:
- Litter-Robot 4 features a wider entry opening that allows larger cats to enter more comfortably and improves accessibility for multi-cat homes.
- Litter-Robot 3 has a standard entry opening that works for most cats but is smaller in size.
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Waste-Drawer Capacity:
- Litter-Robot 4 includes an enlarged waste drawer that reduces how often you need to empty the unit.
- Litter-Robot 3 has a smaller drawer that requires more frequent cleaning.
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QuietSift® Quieter Cycle:
- Litter-Robot 4 has QuietSift® technology that keeps the cleaning cycle significantly quieter for noise-sensitive cats and households.
- Litter-Robot 3 runs on a louder motor that can be noticeable during operation.
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SafeCat System:
- Litter-Robot 4 features a SafeCat System that uses advanced sensors to stop the cycle when a cat approaches.
- Litter-Robot 3 has a simpler sensor system that pauses operation when movement is detected.
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Safety:
- Litter-Robot 4 includes anti-pinch and overload protection that prevents jams and ensures safe operation.
- Litter-Robot 3 provides basic anti-pinch protection without overload monitoring.
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USB Power Port:
- Litter-Robot 4 comes with a USB power port that allows charging of small devices or accessories nearby.
- Litter-Robot 3 does not include a USB power port.
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OdorTrap® Compartment:
- Litter-Robot 4 supports an OdorTrap® system that neutralizes litter box smells more effectively with dual odor control.
- Litter-Robot 3 relies on a single carbon filter for odor management.
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Carbon-Filtered Sealed:
- Litter-Robot 4 includes a fully sealed waste drawer with carbon filters to trap odors more efficiently.
- Litter-Robot 3 uses a carbon-filtered drawer that is less airtight.
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SmartScale® Weight Tracking:
- Litter-Robot 4 features SmartScale® technology that tracks cat weight and litter box usage to support monitoring of feline health.
- Litter-Robot 3 does not include integrated weight tracking.
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Specs at a Glance
| Feature |
Litter-Robot 4 |
Litter-Robot 3 |
| Entry Opening |
Wider design for easier access |
Standard-sized entry |
| Waste Drawer |
Enlarged capacity, sealed, carbon-filtered |
Standard capacity, carbon filter |
| Noise Level |
QuietSift® quieter cleaning cycle |
Louder motorized cleaning cycle |
| Safety System |
SafeCat System with advanced sensors |
Standard sensor-based safety |
| Anti-Pinch & Overload |
Integrated, more advanced |
Basic pinch protection |
| Power Port |
Includes USB charging port |
No USB power port |
| Odor Control |
OdorTrap® dual system with carbon filters |
Carbon filter only |
| Waste Drawer Seal |
Fully sealed, reduces odors more effectively |
Less airtight, allows minor leakage |
| Smart Features |
SmartScale® weight tracking, app integration |
Limited app features, no weight tracking |
| Customization |
Multiple bezel/color options available |
Limited color choices |
Who Should Buy What?
Buy the Litter-Robot 4 if you:
- Want the latest features with advanced safety and odor control.
- Need a quieter unit for noise-sensitive pets or homes.
- Have larger cats that benefit from the wider entry.
- Prefer smart tracking features to monitor cat health.
- Value premium design and customization options.
Check Litter-Robot 4 Best Price
Buy the Litter-Robot 3 if you:
- Prefer a more affordable self-cleaning litter box.
- Want proven reliability without extra features.
- Have smaller cats that do not need a wider entry.
- Do not require app integration or weight tracking.
- Are looking for a straightforward, cost-effective option.
Check Litter-Robot 3 Best Price |
Winner by Category
| Category |
Winner |
| Wider Entry Opening |
Litter-Robot 4 |
| Enlarged Waste-Drawer Capacity |
Litter-Robot 4 |
| QuietSift® Quieter Cycle |
Litter-Robot 4 |
| SafeCat System |
Litter-Robot 4 |
| Anti-Pinch & Overload Safety |
Litter-Robot 4 |
| USB Power Port |
Litter-Robot 4 |
| OdorTrap® Compartment |
Litter-Robot 4 |
| Carbon-Filtered Sealed Waste Drawer |
Litter-Robot 4 |
| SmartScale® Weight Tracking |
Litter-Robot 4 |
| Custom Bezel/Color Options |
Litter-Robot 4 |
What They Have in Common
- Self-Cleaning Function: Both the Litter-Robot 3 and 4 automatically sift waste after each use, reducing the need for daily scooping and keeping the litter box fresh.
- Odor Control: Each model includes a design that helps minimize odors by separating waste from clean litter, which is important for maintaining a fresher home environment.
- Large Capacity: Both units are built with spacious waste drawers, allowing multiple cats or frequent use without requiring constant emptying.
- Safety Features: Each model is equipped with safety sensors that detect when a cat is inside, ensuring the cleaning cycle only runs when it’s safe.
- Wi-Fi Connectivity (Optional): Both versions offer app integration through Wi-Fi-enabled models, allowing owners to track usage and get notifications remotely.
FAQ (Quick Answers)
Is the Litter-Robot 4 quieter than the Litter-Robot 3?
Yes, the Litter-Robot 4 uses QuietSift® technology that makes the cleaning cycle significantly quieter than the Litter-Robot 3, which has a more noticeable motor sound.
Does the Litter-Robot 4 have a bigger entry opening than the Litter-Robot 3?
The Litter-Robot 4 has a wider entry opening that makes it easier for larger cats to enter, while the Litter-Robot 3 has a smaller standard-sized opening.
How often do I need to empty the waste drawer on each model?
The Litter-Robot 4 includes a larger sealed waste drawer that requires less frequent emptying, whereas the Litter-Robot 3 has a smaller drawer that fills up more quickly.
Which model has better odor control?
The Litter-Robot 4 includes both a sealed waste drawer and an OdorTrap® system with carbon filters, while the Litter-Robot 3 relies on carbon filters only, making the newer model better for odor control.
Do both models include safety features for cats?
Yes, both include safety systems, but the Litter-Robot 4 features the advanced SafeCat System with multiple sensors, while the Litter-Robot 3 uses a simpler sensor design.
Does either model support weight tracking for cats?
The Litter-Robot 4 features SmartScale® technology that tracks cat weight and usage data through the app, while the Litter-Robot 3 does not support weight tracking.
Can the Litter-Robot 4 or Litter-Robot 3 connect to an app?
Both models have app connectivity, but the Litter-Robot 4 offers more advanced tracking and features compared to the Litter-Robot 3.
Is the Litter-Robot 4 more expensive than the Litter-Robot 3?
Yes, the Litter-Robot 4 is priced higher due to its newer technology, improved safety, and additional features, while the Litter-Robot 3 is the more budget-friendly option.
Do either models come with customization options?
The Litter-Robot 4 comes with interchangeable bezels and multiple color options, while the Litter-Robot 3 has limited customization.
Which model is better for multi-cat households?
The Litter-Robot 4 is better suited for multi-cat households thanks to its larger entry, bigger waste drawer, and quieter operation, while the Litter-Robot 3 is more suitable for single-cat homes or smaller cats.
