Your cat circles the bowl, takes a tentative lap, then walks away. You’ve tried everything: moving the bowl, changing the water, even adding ice cubes. The real problem might be that still water just doesn’t trigger your cat’s natural instinct to drink. That’s where a smart fountain like the PETKIT Eversweet Ultra comes in, promising flowing water, advanced filtration, and even AI-powered insights. In this review, we’ll break down the Eversweet Ultra and compare it with other leading models from PETKIT and PETLIBRO to help you decide if it’s the right choice for your furry friend.

We’ll cover everything from the innovative filterless design to the smart features that track your pet’s drinking habits. Whether you have a single finicky cat or a multi-pet household, this guide will help you navigate the options. If you’re exploring other smart options, check out our best smart cat water fountains of 2026 for a broader perspective.

Buying Guide: What to Look For in a Cat Water Fountain

Filtration System: Filtered vs. Filterless

The filtration system is the heart of any fountain. Traditional models use replaceable filters to remove hair, debris, and odors. PETKIT’s filter units, like the PETKIT Upgraded Filter Units 3.0, are multi-layer and effective, but they require regular replacement. The Eversweet Ultra takes a different approach with a filterless design that separates clean and wastewater, eliminating filter costs entirely. If you prefer a low-maintenance option, filterless is a game-changer.

However, some cats are sensitive to the taste of unfiltered water. If your cat is picky, a filtered fountain might be safer. For a deep dive into automatic options, see our best automatic cat water fountains for 2026.

Capacity and Refill Frequency

Consider how many pets you have and how often you want to refill. The Eversweet Ultra boasts a massive 5L fresh water tank, which can last up to two weeks for a single cat. The PETKIT EVERSWEET MAX 2 offers 3L, while the PETLIBRO Dockstream 2 provides 3L as well. If you have multiple cats or a dog, a larger capacity reduces the chore of constant refills.

Also, think about power outages. The MAX 2 has a battery backup, and the Ultra has a small reservoir for emergency drinking. For more on app-connected models, check our best pet water fountains with app guide.

Smart Features and Monitoring

Smart fountains like the Eversweet Ultra and PETLIBRO Dockstream 2 offer app monitoring, tracking your pet’s water intake and sending alerts. The Ultra goes further with an AI camera that recognizes your pet and records drinking sessions. If you want to monitor your pet’s health closely, these features are invaluable. But they come at a higher cost.

For a budget-friendly option, the PETKIT Eversweet Solo SE offers basic functionality without app connectivity. Consider your budget and how much data you really need.

Final Thoughts

After evaluating all the options, the PETKIT Eversweet Ultra Cat Water Fountain with AI stands out for its filterless design, huge capacity, and smart camera, making it ideal for tech-savvy pet parents who want the best for their cats. If you prefer a more affordable yet reliable choice, the PETKIT Eversweet Solo SE Cat Water Fountain offers a wireless pump and solid filtration at a fraction of the price. Both are excellent, but your choice depends on your needs and budget.

Frequently Asked Questions

How often should I replace the filter in my PETKIT fountain?

For most PETKIT fountains, replace the filter every 2-4 weeks, depending on usage and water quality. The app will remind you when it’s time. Always soak a new filter in clean water for at least 10 minutes before use.

Is the PETKIT Eversweet Ultra truly filterless?

Yes, the Eversweet Ultra uses a dual-tank system that separates clean water from wastewater, so no filter cartridges are needed. It does use a small replaceable “Fountain Cube” that releases silver ions to keep water fresh, but it’s not a traditional filter.

Can I use the PETKIT Eversweet Ultra with multiple cats?

Absolutely. With a 5L fresh water tank, it’s perfect for multi-cat households. The AI camera can even recognize individual pets and track their drinking habits separately.

Are smart cat water fountains worth it?

If you want to monitor your pet’s hydration and receive alerts, yes. Smart fountains like the Eversweet Ultra and PETLIBRO Dockstream 2 provide valuable insights. For more on this, see our best pet water fountains with app list.