Uzu, An Interactive Light Show 4+

Colordodge Labs

Designed for iPad

    • $1.99



* Winner of Apple's "App of the Week"
* Apple Rewind Best Generative Art and Sound App
* Reached #1 in the App Store
* Featured in Apple's "App Store Essentials Hall of Fame"
* Seen in the "Year of the iPad" Video at the iPad Keynote
* Featured as an Apple Staff Favorite

"This is doodling for digital natives . . . mind blowing." - Wired Magazine

"Uzu for iPad is endlessly complicated, simply fun" - Ars Technica

"This is absolutely the coolest iPad app I’ve ever come across. Heck, it’s likely the most awesome app for ANY device ever." - Chris Pirillo


Uzu is a Generative Design Playground - a sort-of math-physics-art-toy for anyone who ever loved spirographs, fireworks, planetariums, lava lamps, light sabers, pen lasers, tesla coils, christmas lights, or graphing calculators.

Points of light will shoot across the screen and fly to your command, twirling in a vortex of color and motion. Freeze and move Uzu in 3d space while contorting spirographic curves with your fingers. Uzu lets you quickly switch between 10 different modes of real-time animation by simply changing the number of touches you're using. You can spend countless hours discovering the many unique ways of playing and interacting with Uzu.

:::: FEATURES ::::

** Fully dynamic generative particle system
** Create incredible background images for your iPhone or iPad
** 21 unique animation modes can be applied to each number of touches
** 55 Pre-loaded factory presets
** Full customization of all features and settings
** Create and save user presets
** "Re-wire" animation modes as you see fit
** Rotational, translational, and reflective symmetry for each animation mode
** Thousands of possible combinations
** Drawing mode
** Animations respond to microphone input
** In-app quick help


:::: SUPPORT ::::

If you have any problems, questions, or stories you would like to share, please feel free to email me, and I'll answer as soon as I can.

What’s New

Version 3.2.1

--- VERSION 3.2.1
- Fixed bug where mic input wasn't working correctly on some devices

--- VERSION 3.2
This update includes high frame rates, slow motion, and microphone audio responsiveness. In order to make high frame rates possible I had to rewrite all of the animation modes to support a variable time scale. I was then able to use this variable time scale to respond to audio from the microphone. There is a slider in the options panel that allow you to adjust the microphone sensitivity. Thank you so much to all the people who continue to download and support this app.

- Support for high frame rates. Uzu will now use the maximum frame rate of the device. This means 60fps for iPhone and iPad and 120fps for iPad Pro.
- Introduced "Time Scale" property slider that allows you to adjust the speed of the animations without changing the overall shape. See Uzu in slow mo!
- Renamed "Speed" to "Energy". This was done to help differentiate the two properties for affecting the overall speed.
- Uzu now reacts to audio from the microphone. When this mode is enabled, Uzu maps the mic levels to the "Time Scale" property.
- Added mic button to quick action menu.
- The quick action menu now hides when touching the screen.
- The quick action menu hides after a shorter period when not touching the screen.
- Added a slider in the options panel to adjust microphone sensitivity.
- Fixed a number of UI bugs where text would be the wrong color.

Ratings and Reviews

4.8 out of 5
231 Ratings

231 Ratings

joecunningham ,

Outstanding! I have a request.

Uzu is absolutely brilliant! Love it! Thank you for making it sound reactive (I’m one of the people who requested that).

My request: Please please please extend Uzu to the Apple Watch. I realize that much of its UI, like creating custom presets, wouldn’t exist on the watch, and if the preset list is too cumbersome it could just go with whichever one is currently selected on the paired iPhone. Turning the crown could bring up the options (autoplay, screenshot, sound react, etc.). If the watch’s processor is not up to the task, put a ceiling on the number of particles that is goverened by what cpu the app encounters (more on the series 9, less on the series 5, etc).

Having Uzu ever-present on one’s wrist makes it THE watch fidget for those of us who need fidgets for anxiety (haptics would enhance that aspect). A adult could trigger 3-4 behavior changes on the small screen, and my 2yo granddaughter (who’s fascinated with my Apple Watch already anyway) could probably fit 5-6 fingers, squealing with delight. If you want to make putting it on the watch a premium feature, I would definitely pay a fat one-time in-app purchase for that. Thank you for considering it. I sincerely hope you go for it.

Lilredsheep ,

So much fun! Please update soon!!!

I love this app. It is probably my favorite way to play with color digitally. Little ones think it is magic. I love being able to save images and use them for a whole host to purpose. They print beautifully. I would like the ability to adjust background color. Hopefully that is something that can come up in a future update. Speaking of that. I hope there is an update soon. I would really hate to see this one fall win iPadOS advances. I see that the developers website has also gotten dark. I’m hoping maybe he’s just in a really organizing phase and comes back to this wonderful little bit of magic we all enjoy so much. I would legit pay a subscription to keep being able to have it supported.

Daffodil girl ,

Now I get it!!

Great visual entertainment! However, where are the instructions about how to save your own formula? I press + to add a new title, but then if I press Done and then make changes in the design parameters and color choices, they don't "Save". What's step one, then step 2, etc. Thanks for your quick response! 👏👏👏 After I wrote the review I thought, maybe it works in an opposite way to what I thought. So I chose a preset that I liked but wanted to tweak. It worked! Love that the user can create their own. It would have saved a lot of time & frustration, however, if a brief paragraph of instructions were included. Hoping you'll consider adding one next update. Changing my 3 🌟 🌟 🌟 to 5 now that I know how to do my own presets. Thanks again!

Developer Response ,

Thanks for the feedback. Sorry you're having issues with the UI. When you create a new preset by pressing the "+" button, you're saving the current state of all the controls in that new preset. I made it this way to help from accidentally saving over something you already like. So all you need to do is play with the controls until you get something you like, then just create a new preset from those settings.

App Privacy

The developer, Colordodge Labs, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

You Might Also Like

Magic Fluids: visual art & fun
Cosmic Top
Silk 2 – Generative Art
iBeams HD Music Visualizer