- Fixed a regression in the previous release that caused the app to hang after sending an email

- Added additional logging for notification action failures
- Minor fixes for notification actions

- Fixed certain app behaviours not running if they are requested while the web view is reloading (e.g. going to an email after tapping a notification)

- Old user accounts that have been logged out will now be cleared from app storage. This fixes issues like inactive users appearing in the quick actions menu.

- The app will now reliably remember your preference to use the desktop UI on iPad if enabled. The preference has been moved to Settings → Display options → Device → Use desktop interface.

- Fixed overlap of window controls with app UI when using multitasking on iPadOS

- Add support for iPhone Air
- New icons for iOS 26
- Improve efficiency of background network requests
- Update third party dependencies

- Internal changes to app configuration

- Fixed another instance of a white flash when dark mode is enabled. The app will re-show the splash screen when the web view is terminated in the background.
- Updated splash screen appearance

- Fixed keyboard shortcuts not working after transitioning to a native screen (e.g. after viewing an attachment, going to the device settings screen)

- Fixed mailto link handling from Firefox iOS
- Prompt user selection if multiple users are logged in when composing an email from a mailto link

- Reduced app startup time
- Fixed white flash on startup when system dark mode is enabled

- Native inputs (e.g. date selection) will now use your device's locale settings

- Maps will now open when tapping the "Navigate" action on calendar event notifications while Fastmail is in the background

- Check out the updated notification settings screen (Settings → Notifications)

- Fixed certain app behaviours not running if executed multiple times in a row (e.g. tap status bar to scroll to top, run shortcut actions)

- iCloud backup size is now much smaller, in particular for users beta testing offline mode
- Resolved error when decrypting notification content that prevented message details from being displayed

- Use expected user agent in HTTP requests. This fixes "Darwin 24" appearing in the logged in sessions list.

- Updates to third party dependencies
- Fixed navigation to in-app notification settings from system settings

- Fixed possibility of missing toolbar when viewing an attachment
- Fixed missing header background when transitioning to native screens (e.g. device settings)

- Preparatory work for for offline support
- Fixed crash on iPadOS 15 when opening share menu while viewing an attachment

- Preparations for improved offline functionality
- New attachment viewer with improved system level integration
- Fixed viewing attachments when lockdown mode is enabled
- Fixed white flash when loading app if system is using dark mode
- Addressed possibility of an infinite loading screen

- New dark mode icon
- Support for querying device storage

- Improved caching of some assets
- Added icon variants for iOS 18 (light/dark/tinted)
- Updated links to our Terms of Service and Privacy Policy
- Fixed our share extension on iOS 18 for users who received the 4.0.11 update

- Improved caching of some assets
- Added icon variants for iOS 18 (light/dark/tinted)
- Updated links to our Terms of Service and Privacy Policy

- Enhanced passkey support. Users with passkeys can sign in without entering their username.
- Fastmail accounts in your password manager will now be detected during sign in.