Using the camera can affect your app's performance by consuming CPU and memory resources, especially when previewing live video. Maintaining a smooth frame rate of 60fps is important for a good user experience. Excessive camera usage can also increase battery drain quickly.
To keep your app smooth, use the camera preview at a resolution that matches the display size to avoid unnecessary processing. Release the camera resource promptly when not in use. Use background threads for image processing to avoid blocking the main UI thread.
Camera access itself does not add much to app size. However, including large camera libraries or image processing SDKs can increase your app size significantly. Keep dependencies minimal to reduce startup time and bundle size.
On Android, camera access requires runtime permission requests and uses CameraX or Camera2 APIs. On iOS, you use AVFoundation and must declare usage descriptions in the Info.plist. Both platforms require user permission, but the permission dialogs and lifecycle management differ.
It is likely that the app is initializing the camera on the main thread or loading heavy camera resources before showing the UI. To fix this, initialize the camera asynchronously and show a loading indicator if needed.