Users have reported sign-in issues with the BookFusion app on iOS. The most common problems include being unable to sign in with email, Facebook, or Twitter—where authentication appears to succeed but the app then stalls (“moulinez”) and eventually crashes or closes, particularly noted on devices like the iPhone 11 running iOS 13.6.13. Other users mention being unable to create or access their accounts, with no clear error message and no successful login flow3.

Recommended troubleshooting steps:

- Password Reset: If you cannot sign in with known credentials, use the "Forgot Password?" link on the main login page to reset your password. BookFusion support confirms a password reset email will be sent to the email address you registered with2.
- Account Type: If your access is through an organization (e.g., school, publisher), ensure you use the correct login page and credentials. For users signing in with school or MOEY email addresses, follow the link provided in your assignment email and use the "Sign in with Google" option if applicable4.
- App Updates: Make sure your BookFusion app is up-to-date. Some earlier issues may have been resolved in recent updates7.
- Device & OS Compatibility: Note that some reported sign-in and crashing issues were on older iOS versions (like 13.6.1). If possible, update your iOS to the latest supported version for your device3.
- Contact Support: If these steps do not resolve the issue, contact BookFusion support directly at [email protected]. The developers are responsive and have previously addressed reported bugs quickly35.

If none of these measures work, it could be a broader compatibility or server issue—user reviews indicate this may occur intermittently3. Always check for app updates and monitor the official BookFusion support channels for announcements.