20 facts in comparison
PETKIT EverSweet Ultra vs PETKIT EverSweet Max 2 (UVC) vs PETKIT EverSweet Max (Cordless)
Three fountains from one maker, and the spec sheets make them look closer than the decision turns out to be. Two of them are the same body: the EverSweet Max and the Max 2 (UVC) share a three-liter tank, the same weight, the same pump and the same quoted battery figure. The Ultra is a different proposition: five liters, mains power, and the only one of the three you can look at from somewhere other than your own hallway.
That is the first fork, and it comes down to sockets. The Ultra needs an outlet and talks over Wi-Fi. The two Max models run for months on a charge and sync over Bluetooth when your phone is in the room. If the reason for buying a connected fountain is to check on an elderly cat while you are at work, only one of these does that. For water placed where the animal will drink (a quiet corner, away from the food bowl, with no cable to chew), the cordless pair are the only sensible answers and the Ultra is the wrong shape of product.
The second fork is narrower. What separates the Max from the Max 2 is a UVC lamp inside the pump housing and parts you can put in a dishwasher, set against a conventional replaceable filter. PETKIT presents that as a generational step. It reads more like a convenience upgrade.
The Ultra also changes what the water goes through, separating used water into a waste tank instead of recirculating it through a cartridge. That ends filter purchases and adds a tank to empty: a different maintenance routine, not a tidier version of the same one.
Editor’s note
PETKIT has one good fountain body and three different answers to the question of how much technology belongs in a water bowl.
The Max 2 is the one I would point most people towards, because its engineering went into the things that make fountains fail in real homes: skipped cleanings, awkward placement, a cord that chose the location. Parts that survive a dishwasher remove more friction in practice than a sterilizing lamp does.
The Ultra earns its place in multi-cat households and struggles to justify itself anywhere else. Per-animal recognition is what pays for the expense and the extra parts. With one cat you are buying a system to answer a question you could answer by looking at the bowl. Be deliberate about the camera as well: it is a networked camera in your home with an account behind it.
The plain Max is the weakest of the three unless the discount is real, because its filters are a recurring cost the Max 2 does not have.
One caution that applies to all three: PETKIT quotes battery life at an intermittent flow setting, and continuous flow will not reach it. None of them removes the need to clean the thing.
Category strengths
- PETKIT EverSweet Ultra
- PETKIT EverSweet Max 2 (UVC)
- PETKIT EverSweet Max (Cordless)
Spec wins (head-to-head)
- PETKIT EverSweet Ultra 1
- PETKIT EverSweet Max 2 (UVC) 0
- PETKIT EverSweet Max (Cordless) 0
Why PETKIT EverSweet Ultra?
- A much higher water capacity ?5 L vs 3 L
Why PETKIT EverSweet Max 2 (UVC)?
No standout advantages.
Why PETKIT EverSweet Max (Cordless)?
No standout advantages.
Where each one falls short
PETKIT EverSweet Ultra
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 3 specs are unreported (shown as Unknown) and excluded from its scores.
PETKIT EverSweet Max 2 (UVC)
- Water capacity: 5 L vs 3 L vs 3 L
- 5 specs are unreported (shown as Unknown) and excluded from its scores.
PETKIT EverSweet Max (Cordless)
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 5 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Hydration
Power & noise
Smart features
Design & care
Specs last verified September 24, 2026PETKIT EverSweet Ultra: 17 of 20 specs verified (85%)PETKIT EverSweet Max 2 (UVC): 15 of 20 specs verified (75%)PETKIT EverSweet Max (Cordless): 15 of 20 specs verified (75%)Unverified specs show as Unknown — never estimated, never scored
Where to buy
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What reviewers say
The bottom line
Choose the Ultra if you want data from away from home and you have a socket where the bowl ought to go. Per-cat drinking figures are one of the few things a gadget can notice before a vet does, and that is the reason to accept the size, the waste tank and a camera in the room.
The Max 2 (UVC) is the one to buy if you want the fountain to be easy. It goes where the cat wants it, survives a dishwasher, and asks almost nothing of you between charges.
Choose the plain Max only if it is meaningfully cheaper on the day you are buying. It is the same fountain with hand-washing and a filter habit in place of the lamp, and that is the whole of the difference.
