Our Verdict
MeowWhimsy S7 Wins

It accommodates cats up to 33 lbs and has a 15L waste drawer, outperforming UPFAS for larger pets and capacity. Choose UPFAS for medium cats if assembly is not an issue.
Bottom Line: MeowWhimsy S7 is the better choice. It accommodates cats up to 33 lbs and has a 15L waste drawer, outperforming UPFAS for larger pets and capacity.
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)
Who Should Buy Which?
Find the right product for your needs
Buy MeowWhimsy if...
Automatic Self Cleaning Litter
The MeowWhimsy Automatic Self Cleaning Litter Box is ideal for pet parents with larger cats or multi-cat households who prioritize robust safety and convenience. If you need a reliable self-cleaning solution that accommodates cats up to 33 lbs and offers superior protection with both infrared and weight sensors, this is your pick. Its 15-liter sealed waste bin efficiently minimizes odor, and the hassle-free, pre-assembled setup makes it perfect for those seeking immediate use and remote management via the Tuya app.
Buy UPFAS if...
UPFAS Automatic Cat Litter
The UPFAS Automatic Cat Litter Box is perfectly suited for owners of medium cats or kittens who are tech-savvy, appreciate detailed health tracking, and don't mind a bit of DIY. If you're keen on monitoring your cat's weight, usage time, and frequency via an app, and desire an ultra-quiet operation (<35 dB), this product excels. Its fully washable drum part ensures hygiene, making it a great choice for those who value cleanliness and don't mind dedicating 90 minutes for assembly.
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
Which litter box is more suitable for large cats or households with multiple pets?
The MeowWhimsy S7 is better, accommodating cats up to 33 lbs with a 15L waste capacity. The UPFAS is designed for medium cats and kittens and has unlisted capacity, making it less ideal for larger pets.
What are the differences in safety sensors between the MeowWhimsy S7 and UPFAS?
The MeowWhimsy S7 features both infrared and weight sensors, ensuring cleaning pauses if a cat is detected. The UPFAS primarily uses weight sensors for monitoring and includes an anti-pinch design.
How do the two litter boxes compare in terms of initial setup and maintenance?
The UPFAS requires approximately 90 minutes for assembly, while no assembly is noted for the MeowWhimsy. Both offer washable trays/drums, and quiet operation (35 dB). MeowWhimsy includes 40 trash bags.
Are there any specific litter type or Wi-Fi requirements for these automatic litter boxes?
The MeowWhimsy S7 is not compatible with crystal litter and requires 2.4G Wi-Fi. The UPFAS does not specify litter type restrictions but uses Wi-Fi/BT for app control, with no specific band mentioned.
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