Using implicit animations like AnimatedContainer and AnimatedOpacity helps create smooth UI changes without heavy code. They run at 60 frames per second on most devices, giving a fluid feel. However, animating large widgets or many widgets at once can increase CPU and GPU use, which may reduce battery life. Keep animations simple and avoid animating complex layouts to maintain good performance.
To keep animations smooth at 60fps, limit the size and number of animated widgets. Use AnimatedOpacity for simple fade effects instead of rebuilding widgets. Avoid animating layout changes that cause expensive rebuilds. Use const widgets where possible to reduce work. Test on real devices and use Flutter DevTools to check frame rendering times and memory use.
Implicit animations are part of Flutter's core framework, so they add no extra size to your app bundle. Using them does not increase startup time noticeably. The main size impact comes from your app's assets and dependencies, not from these animation widgets.
Flutter's implicit animations behave the same on iOS and Android because Flutter renders its own UI. However, on older Android devices, animations might be less smooth if the GPU is weaker. iOS devices with ProMotion displays can show animations at up to 120fps, making them extra smooth. Test animations on both platforms to ensure consistent experience.
Both Apple App Store and Google Play require apps to be responsive and not freeze during animations. Using implicit animations correctly helps meet this by keeping UI smooth. Avoid animations that cause app crashes or excessive battery drain. Ensure your app complies with accessibility guidelines by providing alternatives or respecting user settings for reduced motion.
Your app takes 5 seconds to load this screen with implicit animations. What's likely wrong?
const widgets where possible, increasing work.