Sending attachments using the Flutter applications might occasionally result in unexpected problems, especially when utilizing the Gmail app. The problem typically entails an error message stating that files cannot be attached, even when the code works flawlessly with other email clients such as Outlook.

This paper describes how to fix the issue of sharing capabilities not working on iOS while operating successfully on Android, using the Flutter framework and the url_launcher package.

When updating user data, managing user accounts in Firebase might be difficult, especially since several functions have been deprecated. Using security authentication credentials, the procedure asks users to authenticate themselves via a verification link. To guarantee data consistency, developers must manage the synchronization between Firestore and Firebase Auth.