Automatic Pet Litter Boxes

decision-helper

Litter-Robot 4 vs 5: Which One Is Worth It?

By Automatic Pet Litter Boxes Editorial

A cream tabby cat lying on the floor beside a litter box

The Litter-Robot 5 is Whisker’s newest globe-style automatic box, and at $799 it runs $100 above the $699 Litter-Robot 4 [s1]. Whether that extra $100 is worth it depends on the size and number of your cats, and on how much you want the newest sensors on a box that is still early-generation.

For most homes, the LR4 is the better buy. It does the same daily job as the LR5, sifting waste into a sealed drawer and weighing your cat on every visit [s3]. It has also had years of software fixes. The early LR5 units are still buggy [s4][s5]. The LR5 earns its extra $100 when you have a large cat that needs the roomier interior, or a fifth cat the LR4 can’t officially handle [s1].

Check the current price on Amazon

Litter-Robot 4 vs 5 at a glance

SpecLitter-Robot 4Litter-Robot 5
Base price$699 [s1]$799; Pro $899 [s1]
Cats supportedup to 4 [s1]up to 5 [s1]
Cat weight range3 to 25 lb [s1]3 to 30 lb [s1]
Interior height16.5” [s1]17.5” [s1]
Entry opening15.75” [s1]15.75” (same) [s1]
Footprint22” × 27” [s1]22” × 27” (same) [s1]
Waste drawer, one catabout 8 days [s1]about 10 days [s1]
Waste-type detectionnoyes, WasteID [s1]
CameranoPro model only, two cameras [s6]
DisplayLED light panel [s1]color LCD screen [s1]
On Amazonyes, as bundles [s1]no clean listing; sold direct and at PetSmart [s7]
Warranty1 year; $100 for 3 years [s1]1 year; $100 for 3 years [s1]

What the Litter-Robot 5 adds

Underneath, the LR5 is the same globe-and-drawer box as the LR4 [s2].

A taller, roomier interior. The globe stands 17.5 inches inside versus the LR4’s 16.5, and the waste drawer is larger, so one cat can go about 10 days between empties instead of 8 [s1]. The entry opening and the 22-by-27-inch footprint are unchanged, so the LR5 is not physically bigger on your floor [s1]. The extra interior room is the main reason a large cat is happier in the 5.

A wider weight range. The LR5 reads cats from 3 to 30 pounds, where the LR4 tops out at 25 [s1]. A Maine Coon or a heavy mixed breed can outweigh what the LR4 tracks. The LR5 still reads them accurately.

WasteID. The LR5 can tell urine from solid waste and time its cycle differently for each [s1][s2]. It also logs the type of every visit in the app. If your cat has kidney disease or a history of urinary trouble, a shift in that log can warn you of a flare-up early. A healthy cat will not need it.

Cameras, on the Pro only. The LR5 Pro adds two 1080p cameras with night vision, one for facial recognition and one aimed at the litter bed [s6]. The base $799 LR5 has none. For cameras you need the $899 Pro [s6]. Cats.com tells camera buyers to skip the base 5 and go straight to the Pro [s4].

The LR5 also swaps the LR4’s LED light panel for a color LCD screen and builds in a carpet tray the LR4 sells separately [s1][s2]. Neither changes how the box cleans.

What stays the same

Most of the LR5 carried over from the LR4. The globe still sifts waste into a sealed drawer, and the box takes up the same 22-by-27-inch footprint [s1][s3]. The app still runs on 2.4 GHz WiFi. The core weight tracking is free, and Whisker+ remains a paid add-on for longer history and video [s3]. If you already own a working LR4, the LR5 will not change your daily routine [s2].

How reliable is the Litter-Robot 5 so far?

This is where the newer box loses ground. The LR5 started shipping in late 2025, so it is still early-generation. Testers who had run an LR4 for years reported more trouble with the 5 and 5 Pro. The motor sometimes needed a manual reset about once a week, on top of sensor errors and a slow app [s4][s5]. BGR’s reviewer, a long-time LR4 owner, called the 5 Pro a step backward and wrote that “an automatic litter box that needs regular manual intervention isn’t really all that automatic” [s5].

The LR4 is not trouble-free. Owners report WiFi drops on its 2.4 GHz radio and the occasional stalled cycle. Its fault rate also climbs once the one-year warranty is up [s3][s8]. The difference is maturity. The LR4 has had years of firmware updates and is the most-tested box Whisker makes, so its problems are known and mostly fixable at home [s3]. The LR5’s early reliability complaints may ease as Whisker updates the firmware, but that is a bet on the future, and today the LR4 is the safer box to live with.

Choose the Litter-Robot 4 if

  • You have one to four small or medium-sized cats [s3].
  • Price and a longer track record matter more to you than the newest sensors [s3].
  • You’d rather buy on Amazon than order direct [s1].
  • Neither WasteID nor a camera is a draw.

Check the current price on Amazon

Choose the Litter-Robot 5 if

  • You have a large cat that needs the taller interior and the 30-pound scale [s1].
  • A fifth cat puts you over the LR4’s four-cat limit [s1].
  • WasteID would help you watch a cat with a kidney or urinary history [s1].
  • You want cameras, which means stepping up to the 5 Pro and its early-generation quirks [s4][s6].

Is the upgrade worth it?

For the average home, the extra $100 buys nothing you will notice day to day [s3]. The LR4 does the same core job and, right now, does it more reliably than the buggy early LR5 units [s3][s5]. The LR5 only earns its price when one of the cases above applies to you [s1].

If your cats are average-sized and you are choosing today, buy the LR4 and put the $100 toward litter. Turn to the Litter-Robot 5 only when one of those needs justifies paying more for a newer, less-settled box.

Frequently asked questions

What is the main difference between the Litter-Robot 4 and 5? The LR5 has a taller interior with room for a fifth cat, plus a wider weight range and waste-type detection [s1]. Underneath, it cleans and controls odor exactly like the LR4.

Is the Litter-Robot 5 worth the extra money? For most cats, no. The LR4 does the same daily job for $100 less and, right now, more reliably [s4]. The LR5 is worth it if you have a large or extra cat, or a health reason to want WasteID [s1].

Can you buy the Litter-Robot 5 on Amazon? We could not find a dedicated Litter-Robot 5 listing on Amazon. Whisker sells it direct and through retailers like PetSmart, while the LR4 is the model widely stocked on Amazon [s1][s7].

Does the Litter-Robot 5 have a camera? Only the LR5 Pro, at $899. The standard $799 LR5 does not [s6].

Should an LR4 owner upgrade to the 5? Usually not. The LR5 does not change the daily experience enough to justify replacing a working LR4, and its early units have drawn more reliability complaints than the 4 [s2][s5].

Sources

This guide draws on Whisker’s product documentation and independent hands-on testing. Reddit owner threads were not reachable when this was written, so owner sentiment here comes from published testers rather than forum posts. Prices are current as of publication and change often.

Check price on Amazon