How Material Design 4 Boosted a Fintech App's Checkout Rate by 18 Percent

A Mumbai-based fintech app rebuilt on Google's Material You design system — spanning Android 12 through 14 and increasingly called Material Design 4 — saw its checkout completion rate rise 18 percent and time-to-first-action fall noticeably in follow-up tests. The original app used two hardcoded shades of blue, leaving users unable to distinguish tappable elements and experiencing a poorly integrated dark theme. Material Design 4 shifts from fixed brand colors to dynamic tonal palettes and expressive shapes, deriving a full color scheme from the user's wallpaper while keeping hierarchy and touch targets consistently legible. The core principle is that design tokens — not hardcoded hex values — drive every component, making the interface systematically clearer rather than merely more attractive. Developers adopting the system are advised to define a base theme using Jetpack Compose Material 3 libraries rather than inheriting from older Material 2 setups.