AVIA is an Android app developed by Deutsche AVIA Mineralöl-GmbH, available for free in the Travel & Navigation category. With AVIA, users can easily store their AVIACARD digitally for payment at participating gas stations. The app allows for seamless payments using the payvia feature directly at the pump. Users can select participating stations via the filter function or identify them by the red payvia button in the station's details. The process involves confirming the station, optionally entering mileage, selecting the pump, refueling, authorizing the purchase with the smartphone's security feature (PIN, Face ID, or facial recognition), and receiving a digital payment receipt via email. AVIA also provides a purchase history for easy tracking and offers a station finder with fuel prices and services information.