Shipping One Codebase to iOS and Android Without Regrets

The promise of cross-platform is one team, one codebase, two stores. The risk is an app that feels slightly wrong everywhere. After shipping a fair amount of mobile, I've found the gap closes when you respect each platform instead of averaging them.

Design to the platform, not the lowest common denominator

• Match navigation and gestures users already expect on each OS.
• Use platform-appropriate typography, spacing, and motion curves.
• Drop to native modules for the few things that truly need it.

Budget for performance early

Jank is a trust killer on mobile. Keep lists virtualized, images sized and cached, and the main thread free during animations. Measuring on a mid-range Android device — not a flagship — keeps you honest.

Users don't grade you on your architecture. They grade you on whether the scroll is smooth.

Cross-platform is a force multiplier when you treat "native feel" as a requirement rather than a bonus. Share the logic, respect the platform, and the savings show up without the user ever paying for them.