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One of my favorite things about the Demos app is that every update generates a slightly different app icon, so it's always a nice little surprise.

Enzo Manuel Mangano

@reactiive.io

2 July

1. the idea is that the app icon is designed via code (using headless Skia) and gets re-created on every build

Enzo Manuel Mangano

@reactiive.io

2. to generate a new app icon on every build i'm using a ci hook from @expo.dev called "eas-build-pre-install". It runs automatically before installing the deps on EAS.

2/7/26, 6:30 pm0 reposts2 likes

Enzo Manuel Mangano

@reactiive.io

2 July

3. to avoid too much randomness and keep the icon easy to recognize, I'm only updating the display text (e.g. 122, the number of animations) and the spiral.

Enzo Manuel Mangano

@reactiive.io

2 July

4. here's the TestFlight if you'd like to get these small surprises too 👀 testflight.apple.com/join/uB9PQHuT

testflight.apple.comJoin the Demos. betaAvailable on iOS

Enzo Manuel Mangano

@reactiive.io

2 July

5. True. That's quite a unique use case, but you could reuse the same trick to generate wallpapers, backgrounds, or even your GitHub thumbnails. The code is fully open source if you'd like to have a look! github.com/enzomanuelm...

github.comGitHub - enzomanuelmangano/demos: An ongoing collection of React Native animations crafted with Reanimated, Gesture Handler, and Skia.An ongoing collection of React Native animations crafted with Reanimated, Gesture Handler, and Skia. - enzomanuelmangano/demos