I already told the owner on the phone, the process to make the check in easier should be much easier. An app had to be downloaded to then follow a web link to have access to the apartment. Not easy, not clear... Apparently this procedure comes from strict regulation in Spain. None of the rest of the group (15 people in total all together in Valencia) had this in the other Airbnb they have booked. If this is the procedure she want to follow she should specify it before booking.