Never Scoop Again—The Litter-Robot 4 Supply Bundle Has Everything You Need to Start

The Supply Bundle includes the Litter-Robot 4 unit (in black), plus the accessories you'd otherwise order separately: 3 OdorTrap refills, 10 waste drawer liners, 30 cleaner wipes, and 2 carbon filters. The unit itself comes with a step, fence, power supply, and quick-start guide.

If you were to buy these accessories individually, you'd spend roughly $60–80 on top of the base unit price. The bundle saves you that and, more importantly, means you don't run out of liners or filters in the first month while you're still getting used to the routine.

When your cat exits the globe, a countdown timer starts (you can set the delay from 3 to 30 minutes). Once the timer expires, the globe slowly rotates, sifting clumps through an internal screen while clean litter stays in the globe. The clumps fall into a sealed waste drawer below, and the globe rotates back to its home position with a fresh bed of litter ready for the next visit.

You empty the waste drawer when the app or the blue flashing light on the control panel tells you it's full. For one cat, that's roughly once per week. For two cats, about twice per week. For four cats, expect to empty it every 2–3 days. The app shows the drawer fill level as a percentage, so there's no guessing.

The Whisker app is free and works with both iOS and Android. You do not need a subscription to use the Litter-Robot 4. The free app covers the essentials: real-time litter and waste drawer levels, cat weight tracking via SmartScale, visit logs, cycle history, and remote cycle control.

Whisker+ is an optional membership at $7.99/month or $79.90/year. It adds daily recap reports, time-of-day insights, duration trends, and up to 2 years of activity history. For most cat parents, the free app is more than enough. Whisker+ is worth considering if you have multiple cats and want to track long-term behavioral trends for health monitoring.

Whisker reports that over 95% of cats acclimate to the Litter-Robot, based on return reasons over a one-year period. The LR4's wider entryway (15.75" vs. the LR3's 10.3") and quieter motor make it more approachable for cautious cats.

The standard acclimation method: keep your old litter box next to the Litter-Robot for 2–3 days, then remove the old box. Some cats switch immediately; others need 1–3 weeks. If your cat is skittish, leave the LR4 unplugged for the first few days so they can explore it without the globe rotating. Then enable automatic mode once they're comfortable going inside.

A small percentage of cats never adjust to enclosed globe-style boxes. This is why the 90-day return window matters—if your cat won't use it after 2–3 weeks of patient acclimation, you can return it.

The Litter-Robot 4 requires clumping clay litter. This is non-negotiable—the sifting mechanism depends on litter forming solid clumps that can separate from clean litter during rotation. Non-clumping clay, crystal/silica gel, pine pellets, paper pellets, tofu litter, and loose-clumping formulas will jam the globe or cause repeated failed cycles.

Compatible brands include Dr. Elsey's Precious Cat Ultra, World's Best Cat Litter, Arm & Hammer Clump & Seal, and Tidy Cats Free & Clean. The community default across Reddit and review sites is Dr. Elsey's Ultra Unscented—tight clumps, low dust, no fragrance buildup in the enclosed globe.

Avoid scented litters. The enclosed globe concentrates fragrance and makes the smell worse, not better. Avoid lightweight formulas—they track more and may not settle cleanly after cycling. And don't overfill—keep litter at or just below the fill line inside the globe.

The LR4's odor control is a three-layer system: the sealed waste drawer traps odors physically, the carbon filter absorbs them chemically, and the optional OdorTrap packs neutralize them with plant-based ingredients. The carbon filter sits at the bottom of the base, directly above the waste drawer—a design improvement over the LR3, which placed it at the front of the drawer where odors could escape.

In practice, most reviewers report no detectable odor unless the drawer is open for emptying. The Spruce Pets' testers noted they 'haven't smelled any cat litter or waste since starting with this litter box.' Forbes' reviewer, who keeps the unit a few meters from their bed, attests to its 'stink-proof design.' The Financial Post reviewer made house guests attest to the odor-free result.

The one caveat: odor control degrades if you let the drawer overfill, skip filter replacements, or use a litter that doesn't clump well (leaving residue in the globe). Replace the carbon filter every 2–4 weeks depending on cat count, and empty the drawer at 75–80% full, not 100%.

The LR4 uses a multi-layer safety system called SafeCat with OmniSense detection. Three laser curtain sensors in the bezel detect when a cat enters or even peeks into the globe. A weight sensor in the base confirms cat presence. If a cat is detected during a cycle, the globe stops immediately and retracts to the home position.

The minimum weight to trigger the sensors is 3 lbs (vs. 5 lbs on the LR3), which means kittens as young as 8–12 weeks can safely use the LR4. There's no upper weight limit—cats up to 25 lbs and beyond can use it comfortably. The globe's 15.75" entryway and roomy interior accommodate large breeds like Maine Coons.

A pinch detector provides a final mechanical safeguard: if the globe detects resistance during rotation (e.g., a cat's tail or paw), it stops and reverses. Firmware updates have progressively reduced false triggers from the laser sensors, which were a common complaint in early production units.

The LR4 ships fully assembled. Out of the box, you: (1) place it on a firm, level surface (not carpet—use the optional carpet tray if needed), (2) plug it in, (3) press the power button to run the initial 2-minute cleaning cycle, (4) add clumping clay litter to the fill line, (5) download the Whisker app and scan the QR code (located under the waste drawer for easy access), and (6) set up cat profiles in the app for weight tracking.

Total setup time: under 10 minutes per multiple testers. The app walks you through each step, including firmware checks. You don't need the app to use the LR4—the control panel works independently—but the app adds litter/drawer level monitoring, weight tracking, and remote cycle control.

Daily: nothing. The LR4 cycles automatically after each use. You might check the app to confirm cycles ran, but there's no daily task.

Weekly (1–2 cats): empty the waste drawer once. Pull it out, tie the liner, toss it, replace with a fresh liner. Takes 30 seconds. Wipe the exterior with a cloth to remove dust. For 3–4 cats, empty the drawer every 2–3 days.

Monthly: replace the OdorTrap pack if you use one. Wipe the rubber gasket around the waste drawer. Check the globe interior for stuck clumps and scrape if needed.

Quarterly: deep clean. Unplug, remove the globe and bonnet, wash all components, let dry completely, reassemble. This takes about an hour. Replace the carbon filter during this cycle.

Annually: full litter replacement. Inspect the globe and base for wear. Check seal strips and replace if peeling.