Use responsive design techniques and CSS media queries to adapt your app's layout for different screen sizes and orientations. Test on various devices to ensure proper display.

Managing different screen sizes and orientations is a fundamental aspect of cross-platform development. To address this, start by employing responsive design techniques that allow your app’s layout to adapt to various screen sizes. Utilize CSS media queries to adjust styles based on device dimensions, ensuring that elements scale appropriately. Implement flexible grid layouts and relative units (like percentages) instead of fixed pixel values to create fluid interfaces that look good on any screen. Test your app on a range of devices, including smartphones, tablets, and desktops, to ensure consistent performance and appearance. Pay special attention to how your app behaves when switching orientations from portrait to landscape; ensure that UI elements reflow correctly and remain accessible. Consider using libraries or frameworks that provide built-in support for responsive design, such as Bootstrap or Tailwind CSS. Additionally, engage users during the testing phase to gather feedback on usability across different devices and make adjustments as necessary. By taking these steps, you can create an app that delivers a seamless experience regardless of screen size or orientation.