Main trade-off
PETKIT Purobot Ultra
A camera inside a litter area will not suit every home.
Head-to-head
PETKIT Purobot Ultra vs PETKIT Purobot Max Pro 2, P9904: Ultra seals bags automatically, Max Pro 2 needs less cabinet depth
The short answer
Choose Ultra for automatic bag sealing and its 10 L waste bin. Choose Max Pro 2 when the shallower, lighter cabinet fits your space better.
Before you choose
The reasoning and the trade-offs
Ultra automates sealing within an attended routine
Ultra seals the bag after a local start. The owner removes it and triggers refill locally. Max Pro 2 uses a one-pull packing action.
What this is based on
The distinction comes from PETKIT’s official records for the P9903 and P9904 systems.
Main trade-off
PETKIT Purobot Max Pro 2
The camera adds a privacy tradeoff.
PETKIT Purobot Ultra
- Choose it for
- Connect to 5GHz Wi-Fi
- Main trade-off
- A camera inside a litter area will not suit every home.
PETKIT Purobot Max Pro 2
- Choose it for
- Use my current clumping litter
- Main trade-off
- The camera adds a privacy tradeoff.
About this comparison
PETKIT Purobot Ultra and PETKIT Purobot Max Pro 2, P9904 compared by cat and opening fit, litter and waste system, daily upkeep.
Ultra is the more hands-off machine. Max Pro 2 is lighter and shallower, but its camera and waste handling are simpler.
Before you choose
How they fit your plans
Ultra's packing feature still requires you beside the box
Ultra can seal a bag, but PETKIT says packing cannot be started remotely in the app. You initiate it at the unit, remove the sealed bag, then trigger the new bag to advance. Choose Ultra if reducing manual bag tying is valuable during that attended routine. Choose Max Pro 2 if its one-pull disposal is sufficient. Neither should be bought as a system that removes household waste while you are away.
Facts behind this advice
Automatic describes parts of the packing sequence, not the entire disposal job. Ultra also requires its compatible refill rings, so a generic trash-bag routine is not equivalent.
Max Pro 2 is shallower but wider than Ultra
For a shallow alcove, Max Pro 2's 21.18-inch depth is useful compared with Ultra's 32.20 inches. However, Max Pro 2 is 25.86 inches wide against Ultra's 20.94. Choose it only if that extra width also fits. Both require a hard level floor and at least two inches from a wall, so cabinet dimensions alone do not establish a usable installed footprint.
Facts behind this advice
The depth saving is 11.02 inches, while width increases 4.92 inches. These use the manufacturer's explicit width-depth labels, plus separate placement guidance. Entrance and servicing space still need checking.
Winner by situation
Start with what you need it to do
Seal and prepare the waste bag automatically
Ultra seals a bag after a local start, then needs owner removal and a local refill command. Max Pro 2 uses a one-pull packing step.
- PETKIT Purobot Ultra
- Better fit
- PETKIT Purobot Max Pro 2
- Not suitable
Check the litter area remotely with two-way audio
Ultra has a rotating 180-degree camera and two-way audio. Max Pro uses a fixed camera with one-way audio.
- PETKIT Purobot Ultra
- Better fit
- PETKIT Purobot Max Pro 2
- Caution
Fit the shallower cabinet
Max Pro 2 is 21.18 inches deep but 25.86 inches wide. Ultra is 32.2 inches deep and 20.94 inches wide.
- PETKIT Purobot Ultra
- Caution
- PETKIT Purobot Max Pro 2
- Better fit
Move the unit during cleaning
Max Pro 2 is about 7.93 pounds lighter.
- PETKIT Purobot Ultra
- Caution
- PETKIT Purobot Max Pro 2
- Better fit
Leave one cat for the longer published interval
PETKIT publishes up to 20 days for Ultra and up to 17 days for Max Pro 2.
- PETKIT Purobot Ultra
- Better fit
- PETKIT Purobot Max Pro 2
- Good
What matters in practice
The differences that matter
Ultra automates sealing within an attended routine
Ultra seals the bag after a local start. The owner removes it and triggers refill locally. Max Pro 2 uses a one-pull packing action.
How we reached this conclusion
The distinction comes from PETKIT’s official records for the P9903 and P9904 systems.
Max Pro 2 is about 34% shallower
At 21.18 inches deep, Max Pro 2 saves 11.02 inches against Ultra's 32.2-inch depth, while needing 4.92 inches more width.
How we reached this conclusion
The percentage uses Ultra’s official 32.2-inch depth as the baseline.
Ultra is about one third heavier
Ultra weighs 32.18 pounds while Max Pro 2 weighs 24.25 pounds. That is a 7.93-pound or 32.7% increase before litter.
How we reached this conclusion
The calculation uses the official empty product weights for models P9903 and P9904.
Choice A
PETKIT, Purobot Ultra
PETKIT Purobot Ultra
The automatic cycle minimum is 3.3 pounds. The cabinet is 20.94 inches wide.
- Best matched use
- Connect to 5GHz Wi-Fi
Checked facts
- Compared identity: Purobot Ultra, model P9903
- Camera and audio: 180° rotating camera and two-way audio
- Waste handling: 10 L bin with locally started packing and sealing, owner removes bag before refill
- Published single-cat interval: Up to 20 days
Choice B
PETKIT, Purobot Max Pro 2, P9904
PETKIT Purobot Max Pro 2
The automatic cycle minimum is 3.3 pounds. The cabinet is 21.18 inches wide.
- Best matched use
- Use my current clumping litter
Checked facts
- Compared identity: Purobot Max Pro 2, model P9904
- Camera and audio: Fixed-angle camera and one-way audio
- Waste handling: 8 L bin with one-pull bag packing
- Published single-cat interval: Up to 17 days
Meaningful differences
What changes the fit
| What changes | PETKIT Purobot Ultra | PETKIT Purobot Max Pro 2 | Why it matters |
|---|---|---|---|
| Compared identity | Purobot Ultra, model P9903 | Purobot Max Pro 2, model P9904 | The Amazon ASIN and official product record both resolve to the current Max Pro 2 identity. |
| Camera and audio | 180° rotating camera and two-way audio | Fixed-angle camera and one-way audio | Ultra offers a wider remote view and lets the owner speak back through the unit. |
| Waste handling | 10 L bin with locally started packing and sealing, owner removes bag before refill | 8 L bin with one-pull bag packing | Ultra seals the bag, then requires owner removal and a local refill command. It holds two extra liters. |
| Published single-cat interval | Up to 20 days | Up to 17 days | The three-day headline gap uses PETKIT’s own single-cat conditions and is not a promise for every litter or cat. |
| Body weight | 32.18 lb | 24.25 lb | Max Pro 2 is 7.93 pounds lighter before litter is added. |
| Cabinet depth | 32.2 inches | 21.18 inches | Max Pro 2 is 11.02 inches shallower, but 4.92 inches wider. Both need operating clearance. |
What you give up
Every choice has a cost
If you choose PETKIT Purobot Ultra
- Its enclosed body is tall and visually substantial.
If you choose PETKIT Purobot Max Pro 2
- The globe is still a poor match for cats that reject enclosed spaces.
Recommendation switch
The decision flips if...
Automatic bag packing and sealing are non-negotiable.
Choose PETKIT Purobot Ultra. Ultra completes those steps without the Max Pro’s one-pull packing action.
The cabinet must stay below 27 inches deep.
Choose PETKIT Purobot Max Pro 2. Max Pro 2's cabinet is 21.18 inches deep while Ultra is 32.2 inches. Check wall and servicing clearance separately.
A rotating remote view and two-way audio matter.
Choose PETKIT Purobot Ultra. Those camera functions belong to Ultra in PETKIT’s original-model comparison.
What matters in practice
How to make the call
The useful difference
Both support camera-based records and cats from 3.3 to 22 pounds.
What the numbers change
Ultra lists a 10 L bin.
The trade-off
Max Pro 2 lists an 8 L bin.
What this comparison cannot tell you
- Cat acceptance cannot be guaranteed.
- Odor depends on litter, diet and cleaning frequency.
- Very young kittens may need manual operation.
What the facts say
What the comparison shows
Useful conclusions from the current automatic litter boxes comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| PETKIT Purobot Ultra |
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| PETKIT Purobot Max Pro 2 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
PETKIT Purobot Ultra
Connect to 5GHz Wi-Fi
See price & reviews on AmazonPETKIT Purobot Max Pro 2
Use my current clumping litter
See price & reviews on AmazonLinks open in a new tab.