Litter-Robot 5 vs Litter-Robot 4 (2026) — Should You Upgrade?

Updated:

Litter-Robot 5 vs 4 compared on current $799/$699 pricing, WasteID, cat-size limits, carpet use, and whether the $100 upgrade makes sense.

How we compare: current official US prices and specifications first, then a separate buying judgment based on which differences solve a real household need. — learn more about our research process

Key Takeaways

  • New buyer: LR5 adds WasteID, more room, a larger drawer, an LCD, and built-in carpet support for $100 more
  • Existing LR4 owner: keep it unless a specific LR5 upgrade solves a current limitation
  • Official US base prices checked July 23, 2026: LR5 $799; LR4 $699
  • Both include a 90-day in-home trial and a one-year WhiskerCare warranty

Bottom Line

"For a first-time buyer, choose Litter-Robot 5 if the $100 premium is reasonable and you value WasteID, more headroom, a larger drawer, a color LCD, or built-in carpet support. Choose Litter-Robot 4 if you want the same core self-cleaning function for $699. Existing LR4 owners should usually keep it unless one of those specific upgrades solves a real problem in their home. WasteID and weight trends support routine monitoring; they do not diagnose illness."

Litter-Robot 5

Litter-Robot 5

by Whisker

$799

~$22/mo over 3 years

Pros

✓ WasteID distinguishes urine from feces for cycle timing and routine monitoring

✓ Supports cats from 3-30 lb and households with up to five cats

✓ Color LCD, larger interior, and built-in carpet compatibility

Cons

× $100 higher base price than Litter-Robot 4

× No integrated camera; that is reserved for Litter-Robot 5 Pro

× Connected features require 2.4 GHz Wi-Fi

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Litter-Robot 4

Litter-Robot 4

by Whisker

$699

~$19/mo over 3 years

Pros

✓ $699 base price keeps the same core automatic sifting experience

✓ SmartScale weight tracking and Whisker app activity history

✓ Supports up to four cats and works with the LitterHopper accessory

Cons

× No WasteID urine-versus-feces distinction

× Narrower supported weight range of 3-25 lb

× Optional Carpet Tray is recommended for accurate weight readings on thick carpet or uneven floors

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Data Snapshot

US list prices and manufacturer specifications checked July 23, 2026. Whisker is the manufacturer, so supported-cat counts, drawer intervals, and feature descriptions are manufacturer claims; retailer prices and bundles can change.

Official sources: Whisker: Litter-Robot 4 vs 5 · Litter-Robot 5 product page · Litter-Robot 4 product page

Feature Comparison

Feature Litter-Robot 5 Litter-Robot 4
Price $799 $699
Waste-Type Identification WasteID distinguishes urine from feces No waste-type identification
Weight Tracking SmartScale in the Whisker app SmartScale in the Whisker app
Display Full-color LCD Buttons and LED light bar
Interior Slightly larger globe with more headroom Standard LR4 globe
Supported Cat Weight 3-30 lb 3-25 lb
Suggested Household Up to 5 cats Up to 4 cats
One-Cat Drawer Interval Up to about 10 days Up to about 8 days
Carpet Use Built-in carpet tray; suitable for any flooring Works on carpet; optional tray improves SmartScale accuracy
Warranty 1 year included; 3 years available for $100 1 year included; 3 years available for $100
In-Home Trial 90 days 90 days
Wi-Fi for Connected Features 2.4 GHz 2.4 GHz

Frequently Asked Questions

Is the Litter-Robot 5 worth $100 more than the Litter-Robot 4?

It is worth the extra $100 when you will use WasteID, need the 3-30 lb weight range or five-cat support, place the unit on carpet, or value the larger drawer and LCD. If those differences do not solve a specific problem, the $699 Litter-Robot 4 provides the same core automatic sifting and app-based weight tracking for less.

Should an existing Litter-Robot 4 owner upgrade to Litter-Robot 5?

Usually not. Keep a working LR4 unless your cat needs more interior room, your household exceeds its supported range, carpet affects weight readings, or you specifically want WasteID and the LCD. The day-to-day self-cleaning function is similar, so the LR5 is a targeted upgrade rather than a necessary replacement.

What does WasteID on Litter-Robot 5 actually do?

WasteID distinguishes urine from feces. Whisker says the unit waits longer for urine clumps to form and cycles sooner after solid waste, while recording routine information in the app. It is a monitoring feature, not a medical diagnosis; discuss meaningful changes in bathroom habits with a veterinarian.

Which model is better for large cats or multi-cat homes?

Whisker lists the LR5 for cats from 3-30 lb and households with up to five cats. The LR4 is listed for cats from 3-25 lb and up to four cats. Both have a 15.75-inch entry, while Whisker describes the LR5 as having more interior headroom.

Do Litter-Robot 4 and 5 work on carpet?

The LR5 has a built-in carpet tray and is listed for any flooring. The LR4 still functions on carpet, but Whisker recommends its optional Carpet Tray on carpet 3 mm or thicker or on uneven flooring to improve SmartScale weight accuracy.

Which one is right for you?

Litter-Robot 5 by Whisker $799 View on Amazon Litter-Robot 4 by Whisker $699 View on Amazon

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Written by Chengxian Yang. Specifications and US list prices were checked against Whisker's official Litter-Robot 4 and Litter-Robot 5 product pages and its May 2026 model comparison. No hands-on testing is claimed. Individual experiences may vary.