You still need to bring your physical travel documents e.g., Passport and travel documents on your day of travel.
If you're unable to upload or scan your travel documents in the App, the check-in and Visa/Document Check desks are open at least 2 hours before your departure time and close strictly 40 minutes prior to the scheduled time of departure. If you do not attempt to upload your documents in the App, you will be charged an airport check-in fee of €55.