BounceUI
Interactive interface labs
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Interactive interface labs. Drag a parameter, feel the change, copy the SwiftUI. Free, offline, no accounts, no ads.
BounceUI is an interactive laboratory for exploring interface behaviour.
Some things can't be understood from documentation alone. A document can tell you that dampingFraction controls overshoot, but it can't make you feel the difference between 0.2 and 0.8. It can describe materials in a table, but it can't let you place an image beneath them and see how legibility changes.
BounceUI lets you experiment with interface behaviour through live, interactive specimens. Open one, drag a control, and see the result immediately. When you find a combination you like, tap Code and copy the SwiftUI that produces it.
WHAT'S INSIDE
Six sections, each exploring a different part of interface design.
Foundations — Explore semantic colour across appearance and contrast settings, Dynamic Type, layout, symbols, shadows, corner curvature and materials.
Components — Experiment with familiar controls and adjust the system parameters that shape how they look and behave, alongside custom variations.
Inputs — Explore presses, drags, gestures, touch interactions and scrolling behaviours, including situations where multiple interactions compete for the same touch.
Motion — Compare springs, curves, transitions and effects side by side. Adjust the parameters and see exactly how each change affects movement.
Liquid Glass — Explore navigation, bars and translucent surfaces using the platform's native APIs.
Patterns — Experiment with small interaction details that make an interface feel considered, including undo, refresh, swipe actions and haptics.
The catalogue grows over time, with specimens added, refined and replaced as better explorations emerge.
HOW IT WORKS
Every specimen is live.
Where a parameter is worth exploring, you'll find an interactive control beneath the stage. The stage stays in place while you experiment, making it easy to focus on one change at a time.
Not sure where to start? Named presets take you straight to useful starting points. From there, adjust the controls yourself and save combinations you want to come back to.
When you're happy with the result, the generated code reflects your current settings. What you copy is what you just explored.
PRIVACY
BounceUI runs entirely on your device.
No accounts. No network requests. No analytics. No tracking. No ads. No subscriptions. No in-app purchases.
Your presets are stored locally and never leave your device.
Haptics can be experienced on a physical device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
We've included general visual polish and responsiveness improvements across all SwiftUI specimens.
The developer, Hassan Javed, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hassan Javed
- Size
- 12.7 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Hassan Javed