The Litter-Robot 4 is the newest flagship model from Whisker, designed to elevate the self-cleaning litter box experience with quieter performance, advanced sensors, and app-based tracking. But is it worth the premium price? In this full review, we’ll explore everything you need to know before upgrading—or buying your first automatic litter box.
Table of Contents
Key Features At a Glance
- Quieter, refined cleaning cycle
- Wi-Fi enabled with real-time waste & litter tracking
- Sealed waste drawer for improved odor control
- Accommodates cats 3–25 lbs
- Sleeker footprint and larger opening
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Brand Overview
Like its predecessor, the Litter-Robot 4 is built by Whisker, a U.S.-based brand with over 20 years of innovation in pet care tech. Known for its customer-centric approach, reliable construction, and modular designs, Whisker continues to dominate the self-cleaning litter space.
Whisker also offers a dedicated support community, extended warranties, and easy-to-order replacement parts.
Trust Factor: Engineered in the USA and backed by a robust support system.
Features & Functionality
Where the Litter-Robot 3 was a workhorse, the Litter-Robot 4 is a smart, sleek evolution. Here’s what makes it different:
- Quiet Operation: Significantly quieter motor—ideal for small spaces and noise-sensitive homes.
- Smart Monitoring: The Whisker app tracks waste drawer fullness, litter level, and cat weight.
- Precision Sensors: Improved sensors accommodate cats as small as 3 lbs with better cycle reliability.
- Odor Control: Better-sealed drawer and internal design reduce smell more effectively than older models.
- Wider Opening: Easier access for large cats, seniors, and mobility-challenged kitties.
Curious if it’s right for your household?
Click here to check the latest price and availability of the Litter-Robot 4 on Amazon.
Durability & Materials
The Litter-Robot 4 is made from premium, BPA-free plastic with improved internal mechanisms to handle daily use. The materials feel slightly more refined than the LR3 and have better soundproofing properties.
Its components are tightly integrated for reduced vibration and better long-term performance, even in multi-cat households. Many owners report that the sealed drawer and improved fit reduce the chance of leaks or misalignment issues.
Built Smarter: Reinforced base and optimized motion parts designed for multi-cat loads.
Price & Value
At around $699, the Litter-Robot 4 is one of the priciest self-cleaning litter boxes available—but it delivers excellent long-term value.
- Includes: Power supply, carbon filter, waste liners
- Smart Features: App access is included—no subscription needed
- Long-Term Savings: Reduces litter waste and odor-related cleanup products
Best For: Tech-savvy cat parents, multi-cat homes, and those prioritizing low noise + odor control.
Customer Reviews
Since its launch, the Litter-Robot 4 has earned high praise across Amazon, Chewy, and Reddit.
Common Praise:
- Quiet and seamless operation
- Excellent for large or multiple cats
- Game-changing smart app functionality
Common Complaints:
- Premium price point
- Slight app learning curve for non-tech users
- Some units experienced initial calibration quirks (usually resolved via updates)
Average Rating: ★★★★☆ (4.6/5)
Pros & Cons
Pros
- Whisper-quiet operation
- Great for multi-cat households
- Sleek, space-saving design
- Best-in-class app integration
Cons
- Expensive upfront
- App setup can feel overwhelming for some
- Still not suitable for cats under 3 lbs
Related Articles
- Litter-Robot 3 vs Litter-Robot 4: Which One Wins? (2025 Comparison)
- Read our full Litter-Robot 3 review here
Final Verdict
If you’re looking for the most advanced self-cleaning litter box available today, the Litter-Robot 4 is hard to beat. It’s thoughtfully designed for multi-cat homes, smart tech users, and anyone who values a quiet, hygienic litter solution with minimal hands-on work.
Recommended For:
- Tech-forward cat owners
- Large cat breeds or senior cats
- Multi-cat households
Not Ideal For:
- Shoppers on a tight budget
- Kittens under 3 lbs
- Those who don’t use mobile apps or Wi-Fi features
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