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Reviews & Guides · Appliances

Litter-Robot 4: a printed Ring camera mount, with Ring Indoor Cam and Litter-Robot 5 Pro context

I added a Ring camera to my Litter-Robot 4 with a 3D-printed mount, so I can see which cat used it and inspect stool appearance after each visit.

Front view of a white spherical automatic cat litter box placed on a wooden floor, featuring an attached camera or sensor module at the top entrance and a black step grate at the bottom. A large circular pixelated mosaic censors the center of the interior globe, flanked by boxes of cat litter on either side.
A top-down view of a white automatic cat litter box featuring a cylindrical white accessory with a black cable mounted over the entrance rim with a bracket.
A close-up shot of a small white cylindrical camera mounted upside down in a white 3D-printed plastic bracket clamped onto the side of a white household appliance. A black power cable loops around the camera, and a portion in the lower left corner is pixelated. A dark front-load washing machine is visible in the background.
A mobile app screen showing playback from an automatic litter box camera. Inside the rounded chamber, a light-colored cat is visible from behind. Beneath the video feed is a timeline showing an event marked "Motion" at 5:05:14 PM, along with playback buttons and a "Live" button.
A smartphone interface displaying a live internal camera feed of an automatic cat litter box filled with litter. Below the video player is a timeline marker indicating 'Motion' detected at 5:13:33 PM, along with standard video playback controls.
A pet monitoring app screen showing camera footage inside an automatic litter box, where an orange tabby cat is seen exploring the interior. Beneath the video frame is a playback interface with a timeline displaying a blue 'Motion' event recorded at 'TODAY 1:29:48 PM', along with media playback controls.

We have two older cats. A few months ago, one of them was found to be drinking too little and had urinary crystals, so we started paying especially close attention to their toilet habits.

We use an LR4 at home. It runs well, but after a cycle finishes, it is hard to tell what the litter clump looks like. The LR5’s biggest selling point is its built-in camera, which can identify which cat went inside and monitor health. That would be great, but we had only bought the previous generation recently, so spending another $899 on the new model was more than I wanted to do.

After getting a 3D printer, I decided to model one myself. I printed a ring-shaped bracket that clips onto the entrance, installed a Ring camera, and made an inexpensive upgrade.

Now I can clearly see which of the two cats goes inside, and I can also observe the color and shape of their stool. This is really useful for a multi-cat household. It is not just about being curious about who is using it; more importantly, it helps with health tracking.

Source: 入了3D坑的小码农 · Xiaohongshu · 2026-05-29 · 花几块钱，用上了最新款Litter Robot. Search this Chinese title in Xiaohongshu to find the original post.

Before You Buy

Models in your region

The owner uses a Litter-Robot 4 with an externally mounted Ring camera, but does not provide a complete Ring model number. The official US and European Litter-Robot 4 listings identify the same core product, while the official Litter-Robot 4 Camera Mount Kit is a separate bracket design and does not validate this 3D-printed ring or every camera combination.

Model in this review Related regional model What to know
Whisker Litter-Robot 4 Whisker Litter-Robot 4 (US) The owner’s camera modification is external and should not be read as a built-in Litter-Robot feature. The US model lists automatic sifting, app activity and weight records, but those records are monitoring estimates rather than medical diagnoses.
Whisker Litter-Robot 4 Whisker Litter-Robot 4 (EU) The official European listing retains the Litter-Robot 4 name and describes quiet sifting, app connection and a cleaning delay adjustable up to 30 minutes. Regional purchase and support conditions differ, so the owner’s US$899 upgrade comment should not be treated as an EU price.
Ring camera used with the owner’s Litter-Robot 4 Ring Indoor Cam (2nd Gen) (US) The source names only a Ring camera and does not provide a readable complete model number. Ring Indoor Cam (2nd Gen) is a related US indoor-camera reference with 1080p video, night vision and a privacy cover, not proof that it is the owner’s camera or compatible with the owner’s printed bracket.
Whisker Litter-Robot 5 Pro Whisker Litter-Robot 5 Pro (US) Unlike the owner’s external LR4 camera modification, the Litter-Robot 5 Pro has dual integrated cameras; the standard Litter-Robot 5 does not. Camera recognition requires enrollment, and some enhanced services require Whisker+.
Model in this review
Whisker Litter-Robot 4
Related regional model
Whisker Litter-Robot 4 (US)
What to know
The owner’s camera modification is external and should not be read as a built-in Litter-Robot feature. The US model lists automatic sifting, app activity and weight records, but those records are monitoring estimates rather than medical diagnoses.
Model in this review
Whisker Litter-Robot 4
Related regional model
Whisker Litter-Robot 4 (EU)
What to know
The official European listing retains the Litter-Robot 4 name and describes quiet sifting, app connection and a cleaning delay adjustable up to 30 minutes. Regional purchase and support conditions differ, so the owner’s US$899 upgrade comment should not be treated as an EU price.
Model in this review
Ring camera used with the owner’s Litter-Robot 4
Related regional model
Ring Indoor Cam (2nd Gen) (US)
What to know
The source names only a Ring camera and does not provide a readable complete model number. Ring Indoor Cam (2nd Gen) is a related US indoor-camera reference with 1080p video, night vision and a privacy cover, not proof that it is the owner’s camera or compatible with the owner’s printed bracket.
Model in this review
Whisker Litter-Robot 5 Pro
Related regional model
Whisker Litter-Robot 5 Pro (US)
What to know
Unlike the owner’s external LR4 camera modification, the Litter-Robot 5 Pro has dual integrated cameras; the standard Litter-Robot 5 does not. Camera recognition requires enrollment, and some enhanced services require Whisker+.

What the owner’s modification adds

The owner’s LR4 already runs automatic cycles, but the owner could not inspect the finished clump from the machine alone. The printed entrance ring and external Ring camera add a visual check: the owner reports identifying each cat and observing stool color and shape in a two-cat household. This is an owner-reported observation, not a verified medical-monitoring feature.

The photographs show a camera or sensor positioned around the LR4 entrance, and the app screenshots show motion-marked video of cats inside the globe. They support the presence of camera footage, but they do not establish the exact Ring model, long-term mount safety or integration with the Whisker app.

Printed ring versus the official LR4 mount

Whisker also sells an official LR4 Camera Mount Kit, but it is a different design: its bracket attaches behind the bezel and uses an included hinge, magnet or screw. The installation guide requires the bracket to remain centered above the entrance, avoid the lasers and keep the cable low and clear of the bezel. Those instructions do not certify the owner’s 3D-printed ring.

Whisker Litter-Robot 4 official Camera Mount Kit · US

Anyone reproducing this approach needs to confirm that the camera view is useful without blocking the entrance, lasers or bezel, and that the cable cannot interfere with moving parts. Those checks are not documented for the owner’s design, so the modification should be treated as an individual project rather than a universally compatible upgrade.

How it compares with camera-equipped alternatives

The owner chose an external camera instead of replacing a recently purchased LR4. The official Litter-Robot 5 Pro reference lists dual integrated cameras, while standard Litter-Robot 5 does not have integrated cameras. Camera-based recognition requires enrollment, and some enhanced services require Whisker+, so the owner’s external Ring footage should not be presented as equivalent to the Whisker camera system.

The US Litter-Robot 4 listing describes automatic sifting, app activity and weight records, while the European listing adds region-specific support and purchase conditions and allows a cleaning delay of up to 30 minutes. Neither listing turns the owner’s visual stool observations into a diagnosis; the official guidance says sensor and app readings are monitoring estimates, not medical measurements.

For a cat with a known urinary problem, camera footage can help an owner notice visits and visible changes, but it is not a substitute for veterinary assessment. The official camera guidance also says the integrated camera is not a medical diagnosis, so health concerns still require professional advice.

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