Our Verdict
MeowWhimsy Automatic Self Cleaning Litter Box Wins

This unit offers superior versatility with a 15-liter waste drawer capacity and support for cats up to 33 lbs, significantly outperforming the UPFAS model designed only for medium cats. Its dual infrared and weight sensors also provide enhanced safety, making it a more robust choice for varied pet sizes. The UPFAS Automatic Cat Litter Box is the better pick for owners of medium-sized cats or kittens who prioritize detailed app-based health monitoring and don't mind a 90-minute assembly at the identical $199.99 price point.
Bottom Line: MeowWhimsy Automatic Self Cleaning Litter Box is the better choice. This unit offers superior versatility with a 15-liter waste drawer capacity and support for cats up to 33 lbs, significantly outperforming the UPFAS model designed only for medium cats.
In-Depth Analysis
How they compare in practice
The most significant practical distinction between the MeowWhimsy AE-box and the UPFAS Little-Box-500C-DIY-001 lies in their cat accommodation and safety features. MeowWhimsy's dual infrared and weight sensors offer a more comprehensive safety net, ensuring the cleaning cycle pauses immediately if a cat is detected, enhancing peace of mind for pet parents. In contrast, the UPFAS relies solely on weight sensors, which, while effective, might not detect a rapidly approaching kitten as quickly. This difference translates into a slightly higher margin of safety with the MeowWhimsy model, especially for households with curious or multiple cats. For multi-cat households or those with larger felines, the MeowWhimsy AE-box presents a clear advantage. Its robust design supports cats up to 33 lbs, while the UPFAS is explicitly limited to "medium cats and kittens," and "not suitable for large adult cats." Furthermore, the MeowWhimsy boasts a substantial 15-liter sealed waste drawer, meaning less frequent emptying compared to the unspecified, likely smaller capacity of the UPFAS, which caters to smaller pets. This larger capacity on the MeowWhimsy translates directly to enhanced convenience and reduced interaction for the owner. The UPFAS model introduces a notable trade-off: a required 90-minute assembly, which is a significant hurdle for some buyers looking for an out-of-the-box solution. While both units operate at a quiet 35 dB noise level, the UPFAS excels in app-based monitoring, tracking specific cat weight, usage time, and frequency—features absent from MeowWhimsy's Tuya app for the AE-box. However, the MeowWhimsy offers an immediately ready-to-use product and a fully washable tray for simpler cleaning, presenting a more straightforward user experience overall. Considering both are priced identically at $199.99, the MeowWhimsy generally offers greater utility and less initial setup effort for a broader range of users, particularly those with larger or multiple cats, making its value proposition slightly stronger despite the UPFAS's unique monitoring capabilities.
Key Differences
The most significant spec differences at a glance
Max Pet Weight Lbs
100% moreAdvantages
Where each product wins
MeowWhimsy
- Max Pet Weight Lbs: 100% higher (33.0 vs 0.0)
Which to Pick for Your Situation
Concrete scenarios with a clear recommendation
For a household with large cat breeds
MeowWhimsyThe MeowWhimsy supports cats up to 33 lbs, making it suitable for larger felines, whereas the UPFAS is not.
For an owner who wants detailed health monitoring via app
UPFASThe UPFAS app monitors cat weight, time, and frequency of use, offering insights into pet health that the MeowWhimsy does not.
For minimizing litter box maintenance in a multi-cat home
MeowWhimsyMeowWhimsy features a generous 15-liter waste drawer, reducing the frequency of emptying compared to the smaller-capacity UPFAS model.
For a user who prefers minimal setup
MeowWhimsyThe MeowWhimsy requires no assembly, unlike the UPFAS which needs 90 minutes of setup time.
Who Should Buy Which?
Find the right product for your needs
Buy MeowWhimsy if...
Automatic Self Cleaning Litter
The ideal buyer for the MeowWhimsy Automatic Self Cleaning Litter Box is a pragmatic pet parent, likely managing a multi-cat household or owning a larger adult feline, who prioritizes robust waste management that minimizes daily scooping and effectively controls odor. This user's key need is a device capable of comfortably accommodating cats up to 33 lbs, making the MeowWhimsy a superior choice over alternatives limited to smaller pets. The generous 15-liter sealed waste bin is a critical feature, significantly extending the time between cleanings and contributing to a consistently cleaner, fresher home environment. Safety is also paramount for this buyer; they deeply value the comprehensive protection offered by the dual infrared and weight sensors. This dual system ensures the cleaning cycle pauses instantly if a cat is detected, providing essential peace of mind, especially in busy households. This buyer prefers an out-of-the-box solution, appreciating that the MeowWhimsy requires no assembly, allowing for immediate setup and use without the frustration of complex instructions. While they might not get the granular cat weight and frequency monitoring offered by products like the UPFAS, their priorities are centered on universal cat compatibility, high-capacity waste management, and a reliably safe, hassle-free operation that doesn't demand initial setup effort, all within the $199.99 budget.
Buy UPFAS if...
UPFAS Automatic Cat Litter
The UPFAS Automatic Cat Litter Box is perfectly suited for owners of medium-sized cats or kittens who are deeply interested in monitoring their pet's health and habits through advanced technology. This buyer views their litter box as more than just a waste solution; it's a tool for pet wellness tracking. They are not deterred by the approximately 90 minutes required for assembly, seeing it as a minor investment for a product that offers unique insights. Their key priority is the granular data provided by the app, which tracks specific cat weight, usage time, and frequency, offering valuable, actionable information about their pet's well-being that can aid in early detection of health issues. The ultra-quiet operation, below 35 dB, is another significant draw, especially for those living in smaller apartments or whose cats are easily startled by noise. While this buyer understands they are sacrificing the MeowWhimsy's ability to handle large cats and potentially its larger waste capacity, these limitations are acceptable given their focus on detailed health monitoring, quiet performance, and the convenience of a fully washable drum for thorough sanitation, all available at the competitive $199.99 price point.
Spec Comparison
9 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $200 | $200 |
| Rating | 4.4(188) | 4.4(942) |
| Sensor Type | infrared, weight | weight |
| Max Pet Weight | 33 lbs | 0 lbs |
| Waste Capacity | 15L | — |
| App Subscription | — | Free |
| Weight | 0 lbs | 0 lbs |
| Model Number | AE-box | Little-Box-500C-DIY-001 |
| WiFi | Yes | Yes |
| Noise Level | 35 dB | 35 dB |
| Dimensions | — | 19.84" × 22.44" × 18.23" |
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Pros & Cons
Quick overview of strengths and weaknesses
MeowWhimsy Automatic Self
- Automates waste removal and scooping
- Sealed 15L waste bin minimizes odor
- Supports cats up to 33 lbs
- Cleaning cycle pauses if cat detected
- Not compatible with crystal litter
- Requires 2.4G Wi-Fi for app control
UPFAS Automatic Cat
- Cleaning noise is below 35 dB.
- App monitors cat weight, time, and frequency of use.
- Drum part is fully washable for cleaning.
- Remote control and monitoring via app (Wi-Fi/BT).
- Requires 90 minutes for assembly.
- Not suitable for large adult cats.
Frequently Asked Questions
Common questions about this comparison
How do the safety features compare between the two litter boxes?
MeowWhimsy uses both infrared and weight sensors for safety, while UPFAS relies solely on weight detection. MeowWhimsy's dual system offers slightly more comprehensive protection by pausing cleaning if a cat is detected.
Can I use either of these litter boxes for my large cat?
The MeowWhimsy is suitable for cats up to 33 lbs. The UPFAS is designed for medium cats and kittens and is explicitly not suitable for large adult cats.
Which litter box requires assembly?
The UPFAS Automatic Cat Litter Box requires approximately 90 minutes for assembly. The MeowWhimsy Automatic Self Cleaning Litter Box comes pre-assembled for immediate use.
What is the waste capacity of the MeowWhimsy litter box?
The MeowWhimsy features a 15.0-liter sealed waste drawer, which helps minimize odor and reduces the frequency of needing to empty the bin significantly.
Do I need a subscription for the app features with either product?
Neither product requires an app subscription. The UPFAS explicitly states an app subscription cost of $0.0, and MeowWhimsy's Tuya app control is included.
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