Qlinq is available on Android and Iphone. Download here: App store: https://apps.apple.com/se/app/qlinq/id1575794108 Google Play: https://play.google.com/store/apps/details?id=se.drobe.qlinq&gl=SE
No worries, Qlinq is cloud based and you can log in on your account through another device to access your tickets.
Yes, your tickets is local on your phone and you have access to your tickets without mobile data.
The receipt will be sent to the e-mail that is connected to your account.