[Home](./index.md) > [@firebase/auth](./auth.md) > [ActionCodeSettings](./auth.actioncodesettings.md) > [iOS](./auth.actioncodesettings.ios.md) ## ActionCodeSettings.iOS property Sets the iOS bundle ID. Signature: ```typescript iOS?: { bundleId: string; }; ``` ## Remarks This will try to open the link in an iOS app if it is installed. App installation is not supported for iOS.