Our Verdict
DuckSky Wins
Its 9L waste capacity offers less frequent emptying compared to PETKIT's 5.5L. Choose PETKIT for cats up to 25 lbs, as DuckSky is limited to 18 lbs.
Bottom Line: DuckSky is the better choice. Its 9L waste capacity offers less frequent emptying compared to PETKIT's 5.
Key Differences
The most significant spec differences at a glance
Max Pet Weight Lbs
28% lessWaste Drawer
64% moreWeight
100% lessAdvantages
Where each product wins
DuckSky
- Waste Drawer: 64% higher (9.0 vs 5.5)
- Weight: 100% lower (0.0 vs 24.0)
PETKIT
- Max Pet Weight Lbs: 28% higher (18.0 vs 25.0)
Who Should Buy Which?
Find the right product for your needs
Buy DuckSky if...
Automatic Litter Box, (2026)
If you're a cat owner seeking an affordable automatic litter box that minimizes daily upkeep, the DuckSky is an excellent choice. Ideal for households with one or more small to medium-sized cats, up to 18 lbs. Its significant 9.0L waste drawer capacity means you'll empty it less frequently, potentially only every two weeks for a 12lb cat. The app control and smart sensors offer modern convenience for remote management, making it perfect for those prioritizing hands-off operation and value.
Buy PETKIT if...
PETKIT Open-Top & AI
The PETKIT is best suited for owners with larger cat breeds or multi-cat households where some felines exceed 18 lbs, as it accommodates cats up to 25 lbs. If you prioritize advanced safety sensors like OmniSense and potentially detailed health monitoring (via the AI Camera feature), this unit justifies its slightly higher price. Its reliable auto-cleaning and higher user rating of 4.5 suggest a robust, well-regarded product for those seeking premium performance and peace of mind for their bigger companions.
Spec Comparison
9 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $190 | $200 |
| Rating | 4.1(1.1k) | 4.5(165) |
| Sensor Type | infrared, weight, smart | OmniSense |
| Max Pet Weight | 18 lbs | 25 lbs |
| Waste Capacity | 9L | 5.5L |
| App Subscription | — | Free |
| Weight | 0 lbs | 24 lbs |
| Model Number | Cat litter boxes & liner 03 | Purobot Crystal Duo |
| WiFi | Yes | Yes |
| Dimensions | — | 22" × 30" × 27" |
| Cleaning Cycle | — | 7 min |
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Pros & Cons
Quick overview of strengths and weaknesses
DuckSky Automatic Litter
- 65L toilet volume for cats up to 18lbs.
- 9L waste bin holds 2 weeks for 12lb cat.
- Infrared and weight sensors track cat usage.
- App controls cleaning modes; remote operation.
- App requires 2.4GHz Wi-Fi network.
- Ozone generation for odor control has health risks.
- Full internal cleaning requires disassembly.
PETKIT Open-Top &
- Auto-cleans after each use
- WiFi app monitoring
- Fits cats up to 25 lbs
- Low noise operation
- Large footprint
- High upfront cost
- Requires specific litter
Frequently Asked Questions
Common questions about this comparison
Which is better for multiple cats?
DuckSky's 9L waste capacity is beneficial for multiple cats, reducing emptying frequency. However, PETKIT accommodates larger individual cats up to 25 lbs, compared to DuckSky's 18 lbs limit, which can be a factor for larger breeds in a multi-cat home.
What's the main difference in waste capacity?
The DuckSky features a substantial 9.0L waste drawer capacity, providing significantly more storage before needing to be emptied. In contrast, the PETKIT has a 5.5L capacity, requiring more frequent maintenance for comparable usage.
Which has better sensor technology?
DuckSky uses infrared, weight, and smart sensors for tracking cat usage. PETKIT features OmniSense technology, offering comprehensive detection. Both aim for accurate cat detection and safety, with different proprietary approaches.
Which is better for larger cats?
PETKIT is better for larger cats, supporting pets up to 25 lbs. The DuckSky model has a maximum pet weight limit of 18 lbs, making PETKIT a more suitable choice for heavier felines.
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