Introducing Aquarium 4K: The most innovative and insanely beautiful Wallpaper application ever conceived. Aquarium 4K features over 20+ stunning themes, with each theme featuring breathtaking 4K Video and the most cutting-edge and beautiful Widgets ever to grace a Desktop! 4K Videos include a huge variety of exotic fish; including: Sting Rays, Jelly Fish, Cat Fish, Clown Fish, Lion Fish, Sea Horses, Alligators, and much more! Also visit a variety of locations around the world the Great Barrier Reef, the Bahamas Barrier Reef, Thailand, and more. And if you're going to be away from your computer for a while, Aquarium 4K includes an optional Screen Saver Mode! Aquarium 4K also features a super efficient video player foundation that can play full 4K videos while consuming on average 5% CPU per display; so it's not only insanely beautiful -- but ridiculously efficient as well.

Other features include Unlimited Display support, with each Display being independently customizable; 30+ Widgets to live on your Desktop with each Widget supporting customizable position, size, font, foreground color, and background color, and you can even load your own Quicktime videos. Built on tested and proven technology, Aquarium 4K is the most beautiful application to ever live on your Desktop. Aquarium 4K works great on 3K and 5K displays as well!

Super Cool Features!
- 20+ 4K Ultra HD Themes as Video Wallpaper or can be put in Screen Saver mode
- All included Quicktime videos are full 4K Ultra HD Quality
- Fish include: Sting Rays, Jelly Fish, Cat Fish, Clown Fish, Lion Fish, Elephant-Nosed Fish, Sea Horses, Alligators, Sea Anemones, Blue Tang Fish, and much more
- Visit various locations around the world including: The Great Barrier Reef, the Bahamas Barrier Reef, Thailand, and more
- Unlimited Display support, with each display being independently customizable
- Super efficient Video Player foundation can play full 4K videos while consuming on average 5% CPU per display
- Load your own Quicktime videos
Screen Saver Mode can optionally be Enabled from the Menu Bar
- Choose Themes graphically with a single click
- Add over 30 different Widgets with a single click; with each Widget supporting customized position, size, font, foreground color, and background color
- Forecast Widgets show Temperature, Conditions, Wind speed, Humidity, and Pressure for the next 12 hours
Works great with 3K, 4K, and 5K displays
Incredibly advanced, yet super easy to use
- Future-Proof!

What’s New

Version 1.0.4

- Application is now a Universal Binary for Big Sur
- New App Icon
- Updated User Interface
- Fixed various bugs throughout the application

Ratings and Reviews

2.2 out of 5
6 Ratings

6 Ratings

Em Vee Kay ,


Not really a screen saver, as you have to activate it manually. 20 different views, but they’re all looped clips 10 to 30 seconds long. The clips are HD, as advertised. The widgets are marginally useful, although some of them do not work correctly and there are plenty of apps that do the same things more effectively.

I was hoping for a screensaver that simulated a live aquarium. 30 second loops, even with 20 choices, are not satisfactory for this purpose. If there were fewer selections with longer clips (15 to 30 minutes each) this app would be what I was looking for.

I suspect the developers of this application do not actually use it.

iOS #1 ,

It’s Not OK...

. . . to skip the use of blue filters! It renders a bluish hue in certain scenes. While it is acceptable to have said hues, the purpose would be more artistic and cleaner in appearance. The scenes themselves would be much improved. Please appy an update in the near future to meet customers’ concerns and feedback and it will help your app succeed.

Malloc() ,

Multiple monitor support, 20 scenes

I bought both this live desktop aquarium pp and another, more popular app. They were the same price.
This is the app I needed. I have 3 monitors and this app can display to all 3 monitors and I can choose a separate scene on each monitor.
This app also lets you upload your own Quicktime vidoe, which is something I may want to do in the future.
I have not tried the widgets, so I cannot review them.

App Privacy

The developer, Mach Software Design, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer