Quick decision
Start with the cat's size, mobility and temperament, not app features. The Max Pro 2 offers a larger listed entry and 76 L drum; the Ultra offers automatic bag packing and a larger 10 L waste bin. Both add camera tracking and connected-device responsibilities.
Measure the cat and location
PETKIT lists both products for cats from 3.3 to 22 lb, but weight alone does not describe shoulder width, arthritis or confidence entering an enclosed drum. Measure the installation space and preserve an open route that cannot trap the cat.
Tracking is not diagnosis
Camera and weight records can help owners notice changes in frequency, duration or which cat visited. They do not diagnose urinary, kidney or digestive disease. Concerning changes require direct observation and veterinary advice.
Waste handling choice
The Max Pro 2 uses an 8 L sealed drawer, while the Ultra uses a 10 L bin and automatic bag packing. Packing can reduce direct contact, but increases dependence on compatible consumables and mechanisms.
Cleaning and privacy
Automation does not remove the need to add litter, clean sensors, wipe surfaces and deep-clean the drum. A camera inside the home also deserves review of account security, video retention, network access and household consent.
Bottom line
Choose Max Pro 2 for a roomier entry and conventional drawer; choose Ultra for bag packing. If the cat dislikes enclosed boxes, has mobility issues or the household does not want an indoor camera, a simpler box may be the better decision.
Scenario shortlist
Order reflects this guide's use-case discussion, not a laboratory performance score.
Sources
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