Comparison

Uzu, An Interactive Light Show vs fluidity HD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Uzu, An Interactive Light Show

Explore a generative design playground that combines math, physics, and art. Create dynamic light shows with interactive particle systems, customizable animations, and drawing modes. Experience endless possibilities for visual creation and interaction.

Highlights
  • Generative particle system
  • Real-time animation modes
  • Interactive 3D manipulation
  • Drawing mode
  • Microphone input response
  • Customizable presets
Features
Read full description

"This is doodling for digital natives . . . mind blowing." — Wired Magazine "Uzu for iPad is endlessly complicated, simply fun." — Ars Technica Uzu is a generative design playground — a math-physics-art toy for anyone who ever loved spirographs, fireworks, planetariums, lava lamps, light painting, kaleidoscopes, or graphing calculators. Touch the screen and watch thousands of particles swirl, spiral, and bloom in real time. Change the entire feel by simply changing how many fingers you use. Relax. Play. Meditate. Create wallpapers. Or lose yourself for an hour tweaking symmetry, animation modes, and effects. Uzu is endlessly deep and simply fun. Now completely rebuilt with a native Metal engine and a beautiful SwiftUI interface — smoother, richer, and more powerful than ever. FEATURES • Fully dynamic generative particle system • 21 animation modes for each touch count (0 through 10) • Rotational, translational, and reflective symmetry • 122 factory presets plus unlimited user presets • 10 visual effects: Glow, Warp, Kaleidoscope, Sparkle, Feedback, Color, Gradient, Pixelate, Scanlines, and Vignette • Export and import presets — save, share, and back up your creations • Fast preset switching, shake to hide the menu, adjustable quality settings • Freeze mode, microphone reactivity, and thousands of possible combinations • Create stunning backgrounds for iPhone and iPad ACCLAIM • Winner of Apple's "App of the Week" • Apple Rewind: Best Generative Art and Sound App • Reached #1 on 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 SUPPORT Questions or stories? We'd love to hear from you. jason@colordodge.com www.colordodge.com

About

fluidity HD

Experience a beautiful, real-time fluid dynamics simulation. Control the flow and colors of liquids with intuitive touch gestures. Unlock advanced features like ambient audio and video output through an in-app purchase.

Highlights
  • Real-time fluid dynamics simulation
  • Interactive touch controls
  • Stunning color customization
  • Ambient audio (in-app purchase)
  • Snapshot and video output (in-app purchase)
Features
Read full description

A beautiful interactive realtime fluid dynamics simulation, control fluid flow and stunning colours at the tips of your fingers. In-App purchase enables ambient audio, double tap screen to take a snapshot, settings storage, and menuless video out using VGA, Component or Composite cable.

Screenshots

Uzu, An Interactive Light Show4 screens
fluidity HD1 screens

Verdict

The call

The clearest difference is price: fluidity HD at Free against Uzu, An Interactive Light Show's $3.99. fluidity HD also leads on iOS requirement (8.0 vs 17.6). Uzu, An Interactive Light Show's advantage is rating (4.8 vs 3.7) and in-app purchases (none vs 1). On ratings volume, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

fluidity HD is free to download; Uzu, An Interactive Light Show costs $3.99 up front. fluidity HD sells 1 one-off in-app purchase. Uzu, An Interactive Light Show asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Uzu, An Interactive Light Show holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 261 and 124 respectively. Written reviews point the same way: 91% of Uzu, An Interactive Light Show's written reviews are positive against 73% of fluidity HD's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 18, 2026.

Scorecard7 real differences · 4 level
Uzu, An Interactive Light Show versus fluidity HD: the parameters behind the verdict, then further details
ParameterUzu, An Interactive Light Showfluidity HD
Price$3.99Free — better
Rating4.8 (261 ratings) — better3.7 (124 ratings)
Positive reviews91.1% of reviews — better73.3% of reviews
Number of ratings261 — better124
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#93 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.68.0 — better
Further details — not scored
Size16 MB24 MB
Age rating4+4+
DeveloperColordodge Labsnebulus design

Customer experience

Uzu, An Interactive Light Show

All ratings261 ratings
Positive95.0%
Neutral2.3%
Negative2.7%
Written reviews369 reviews
Positive91.1%
Neutral4.1%
Negative4.9%

fluidity HD

All ratings124 ratings
Positive62.1%
Neutral12.1%
Negative25.8%
Written reviews165 reviews
Positive73.3%
Neutral6.7%
Negative20.0%

User reviews

Uzu, An Interactive Light Show

From 261 App Store ratings

What we love

  • 👍 Mesmerizing visuals
  • 🎨 Endless creative possibilities
  • 💡 Great for relaxation and meditation
  • 🎨 Impressive color and pattern generation
  • 👍 Fun and engaging for all ages

Room to improve

  • 🐛 Crashes and stability issues on some devices
  • 🔧 Limited customization options
  • 🔧 Lack of music/sound integration
  • 🔧 Outdated UI on newer iPads

fluidity HD

From 124 App Store ratings

What we love

  • 🌈 Visually stunning and mesmerizing
  • 🧘‍♀️ Calming and relaxing experience
  • 🎨 Vibrant and customizable colors
  • 👍 Great for kids and adults

Room to improve

  • 🐛 Crashes and freezes on some devices
  • 🔇 Lack of audio/music features
  • 💰 Paid version not worth the cost
  • 🔋 High battery consumption

Bugs and requests

Uzu, An Interactive Light Show

Reported bugs

3 issues
  • Crashes on iOS 4.2 and newer
  • Menu controls not working on iPad Pro
  • Screenshot feature not functioning properly

Requested features

5 requests
  • Add music/sound reactive features
  • Implement full-screen mode without UI
  • Introduce more advanced preset options
  • Add ability to save and share custom presets
  • Optimize performance for latest iPad models

fluidity HD

Reported bugs

3 issues
  • Crashes on double-tap
  • Incompatible with newer iOS
  • Stuck finger gestures

Requested features

4 requests
  • Add music/ambient sound options
  • Ability to save/export creations
  • More customization controls
  • Support for latest iOS versions

In-app purchases

None

Uzu, An Interactive Light Show

No in-app purchases

1 purchases

fluidity HD

One-time1
  • Full Version Unlock$1.99

Questions

Is Uzu, An Interactive Light Show free?
Uzu, An Interactive Light Show costs $3.99, with no in-app purchases.
Is fluidity HD free?
fluidity HD is free to download, with in-app purchases available.
Which has better reviews, Uzu, An Interactive Light Show or fluidity HD?
Uzu, An Interactive Light Show is rated higher. Uzu, An Interactive Light Show averages 4.8 out of 5 from 261 ratings, while fluidity HD averages 3.7 from 124 ratings.
Do Uzu, An Interactive Light Show or fluidity HD have ads?
Neither Uzu, An Interactive Light Show nor fluidity HD shows ads.
Which is updated more often, Uzu, An Interactive Light Show or fluidity HD?
Uzu, An Interactive Light Show ships an update every 2 months, and fluidity HD every 2 months. Most recently, Uzu, An Interactive Light Show was updated on October 18, 2026 and fluidity HD on October 18, 2026.

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