The lidX App - The next generation mobile payment terminal The lidX App is a comprehensive Android solution that replaces traditional payment terminals and offers numerous additional functions. It transforms any Android device into a fully functional terminal, be it a desktop cash register, a smartphone, a handheld / mobile computer or a tablet. The lidX app supports various tipping functions, cashback, cash register connections (ZVT, O.P.I.), digital receipts, and in over 100 languages.