This app is an online tally for billing of consumption of drinks (and snacks) membership in associations or similar organizations. The basis is the app on an example iPad (iOS 8) installed and used in kiosk mode for Selbstbedinung to eg. a wall next to the refrigerated display case. (Kiosk: About settings as "Guided Access" limited to only this app). Members receive a PIN to bookings on their own account to perform. If the PIN is forgotten once it can be sent by email. This email is also sent