The redirectToMobilePayUrl is returned in the response body of payment initiation. The url is an universal link. This means that it can both open in a browser and open the MobilePay app if this is installed.
Please note for iOS: When a user taps a universal link iOS also examines the user’s recent choices to determine whether to open the app or the url in the browser. For example if a user choose to open the url in the browser iOS continues to open the url in the browser until the user changes this setting.
Please note for Android: When the user is redirected to the url the user will be prompted to choose whether to open the link in the browser or to open the MobilePay app. The user can then choose to save this setting and any future visits to the MobilePay url will follow this setting.