App signing itself does not affect the frame rate or memory usage of your Flutter app. It is a security step that ensures your app is trusted by devices and app stores. However, a properly signed app can prevent installation issues that might cause crashes or slow startup times.
Use release keys and avoid debug keys for production builds. Keep your signing keys secure and backed up to prevent delays. Automate signing with Flutter build commands to reduce human errors. This ensures your app builds quickly and is ready for store submission without delays.
App signing does not increase your app's size or startup time. It only adds a digital signature to your app package. The size and speed depend on your app code and assets, not the signing process.
On Android, you sign your app with a keystore file using Gradle or Flutter commands. Android requires signing for all APKs or AABs before publishing. On iOS, signing uses certificates and provisioning profiles managed in Xcode and the Apple Developer portal. iOS requires code signing for all builds, including development and release. Flutter integrates with both platforms' signing systems but you must configure each separately.
If your app is slow to start, check if you are accidentally using a debug build instead of a signed release build. Debug builds are not optimized and can be slower. Also, verify your signing configuration is correct so the app installs and runs properly without delays.