The catch
PETKIT Purobot Ultra
Some homes won't accept a camera inside the litter area.
Side by side
PETKIT Purobot Ultra vs PETKIT Purobot Max Pro 2, P9904 Compared: Max Pro 2 needs less cabinet depth, and Ultra seals bags automatically
Quick verdict
Ultra is the one with automatic bag sealing and a 10 L waste bin. Max Pro 2 is the better pick when its shallower, lighter cabinet suits your space.
Before you buy
Why, and what it costs you
Ultra seals automatically, but you stay present for the routine
Sealing on Ultra begins from a local start. The owner takes the bag out and triggers the refill at the unit. Max Pro 2 packs with a single pull.
Where this comes from
PETKIT’s official records for the P9903 and P9904 systems are the source of this distinction.
The catch
PETKIT Purobot Max Pro 2
Having a camera means giving up some privacy.
PETKIT Purobot Ultra
- Why pick it
- Get online over 5GHz Wi-Fi
- The catch
- Some homes won't accept a camera inside the litter area.
PETKIT Purobot Max Pro 2
- Why pick it
- Keep using the clumping litter I have
- The catch
- Having a camera means giving up some privacy.
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What this page compares
A look at PETKIT Purobot Ultra and PETKIT Purobot Max Pro 2, P9904 on cat and entry fit, litter and waste handling, and daily upkeep.
Ultra asks less of you by hand. Max Pro 2 is lighter and shallower, though its camera and waste handling are simpler.
Day to day
How each one fits your routine
You still have to stand beside the box for Ultra's packing feature
Ultra can seal a bag, but according to PETKIT the app cannot start packing remotely. You start it at the unit, take out the sealed bag, and then trigger the new bag to advance. Pick Ultra if tying fewer bags by hand is worth something during that attended routine. Pick Max Pro 2 if its one-pull disposal is enough for you. Don't buy either one expecting it to clear household waste while you are away.
Where this comes from
Only parts of the packing sequence are automatic. The rest of the disposal job is still yours. Ultra also needs its compatible refill rings, so an ordinary trash-bag routine is not the same thing.
Max Pro 2 is less deep than Ultra but wider
In a shallow alcove, Max Pro 2's depth of 21.18 inches helps next to Ultra's 32.20 inches. Max Pro 2 is, however, 25.86 inches wide, where Ultra is 20.94. Pick it only if the extra width fits too. Both need a hard, level floor and at least two inches of space from a wall, so the cabinet dimensions alone don't tell you the footprint you can install.
Where this comes from
Depth drops by 11.02 inches and width grows by 4.92 inches. The figures come from the manufacturer's explicit width and depth labels, along with separate placement guidance. Entrance and servicing space still need to be checked.
Which one fits
Pick the situations that sound like you
Have the waste bag sealed and prepared automatically
On Ultra, you start sealing at the unit, then remove the bag yourself and give a local refill command. Max Pro 2 packs with a single pull.
- PETKIT Purobot Ultra
- Better fit
- PETKIT Purobot Max Pro 2
- Not suitable
Check on the litter area from a distance with two-way audio
Ultra's camera rotates through 180 degrees and comes with two-way audio. Max Pro has a fixed camera and one-way audio.
- PETKIT Purobot Ultra
- Better fit
- PETKIT Purobot Max Pro 2
- Caution
Place the shallower cabinet
Depth on Max Pro 2 is 21.18 inches, though it is 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
Shift the unit while cleaning
Max Pro 2 weighs about 7.93 pounds less.
- PETKIT Purobot Ultra
- Caution
- PETKIT Purobot Max Pro 2
- Better fit
Leave one cat, using the longer published interval
PETKIT's published figure is 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
In practice
Differences you will notice
Ultra seals automatically, but you stay present for the routine
Sealing on Ultra begins from a local start. The owner takes the bag out and triggers the refill at the unit. Max Pro 2 packs with a single pull.
How we worked this out
PETKIT’s official records for the P9903 and P9904 systems are the source of this distinction.
Max Pro 2 is shallower by about 34%
Max Pro 2 is 21.18 inches deep, which is 11.02 inches less than Ultra's 32.2-inch depth, but it needs 4.92 inches more width.
How we worked this out
Ultra’s official 32.2-inch depth is the baseline for the percentage.
Ultra is heavier by about one third
Max Pro 2 weighs 24.25 pounds and Ultra weighs 32.18 pounds. The difference is 7.93 pounds, or a 32.7% increase, before litter.
How we worked this out
Official empty product weights for models P9903 and P9904 go into the calculation.
Option A
PETKIT, Purobot Ultra
PETKIT Purobot Ultra
The cabinet is 20.94 inches wide, and automatic cycles require at least 3.3 pounds.
- Best for
- Get online over 5GHz Wi-Fi
Facts we checked
- 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
Option B
PETKIT, Purobot Max Pro 2, P9904
PETKIT Purobot Max Pro 2
Its cabinet is 21.18 inches wide and its automatic cycle minimum is 3.3 pounds.
- Best for
- Keep using the clumping litter I have
Facts we checked
- 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
Spec by spec
Where they really differ
| Spec | PETKIT Purobot Ultra | PETKIT Purobot Max Pro 2 | In practice |
|---|---|---|---|
| Compared identity | Purobot Ultra, model P9903 | Purobot Max Pro 2, model P9904 | Both the Amazon ASIN and the official product record point to the current Max Pro 2. |
| Camera and audio | 180° rotating camera and two-way audio | Fixed-angle camera and one-way audio | Ultra gives a wider remote view, and the owner can talk 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 and then needs the owner to remove it and give a local refill command. It also holds two more liters. |
| Published single-cat interval | Up to 20 days | Up to 17 days | PETKIT’s own single-cat conditions produce the three-day headline gap, which isn't promised for every litter or cat. |
| Body weight | 32.18 lb | 24.25 lb | Before any litter goes in, Max Pro 2 weighs 7.93 pounds less. |
| Cabinet depth | 32.2 inches | 21.18 inches | Max Pro 2 is shallower by 11.02 inches and wider by 4.92 inches. Both need clearance to operate. |
Trade-offs
What each pick costs you
With PETKIT Purobot Ultra
- The enclosed body is tall and has a lot of visual presence.
With PETKIT Purobot Max Pro 2
- Cats that refuse enclosed spaces are still a poor match for the globe.
Change of plan
When the answer changes
You need automatic bag packing and sealing.
Go with PETKIT Purobot Ultra. Ultra handles those steps and does not rely on the Max Pro’s one-pull packing action.
Cabinet depth has to be under 27 inches.
Go with PETKIT Purobot Max Pro 2. The Max Pro 2 cabinet is 21.18 inches deep and Ultra's is 32.2 inches. Wall and servicing clearance need a separate check.
You care about a rotating remote view and two-way audio.
Go with PETKIT Purobot Ultra. In PETKIT’s original-model comparison, those camera functions are on Ultra.
Decision guide
How to decide
Automatic bag sealing and a 10 L waste bin favor Ultra. A shallower, lighter cabinet that fits your space favors Max Pro 2.
What sets them apart
Camera-based records and cats from 3.3 to 22 pounds are supported by both.
What the specs tell you
Ultra's listed bin is 10 L.
The downside
An 8 L bin is what Max Pro 2 lists.
What this page can’t tell you
- Whether your cat adapts is not guaranteed.
- Odor hinges on your litter, diet and cleaning schedule.
- Very young kittens could require hand operation.
By the numbers
What the data shows
What we found across the automatic litter boxes we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| PETKIT Purobot Ultra |
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| PETKIT Purobot Max Pro 2 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
PETKIT Purobot Ultra
Get online over 5GHz Wi-Fi
See price & reviews on AmazonPETKIT Purobot Max Pro 2
Keep using the clumping litter I have
See price & reviews on AmazonEach link opens in a new tab.
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