Now with the Xalkiadakis app you can see useful information from the supermarket you trust! With the Xalkiadakis application and having acquired the Xtra Card you can: - see the points from your purchases - see if you have won one of our monthly contests - see discounts on selected items - Create your shopping lists easily and quickly - browse your shopping history - update your membership card details - find out the origin and details of your fruits and vegetables through the e-cert service -