au PAY Card is a free finance application for Android by auフィナンシャルサービス株式会社. The app is designed to provide a convenient and safe way to manage au PAY Card payments. The app offers biometric authentication (fingerprint or face recognition) for safe login, and the home screen shows important information such as billing amount, payment date, available amount, and available points. With just one tap, users can easily check their usage details and set push notifications to prevent overuse. The app also provides the latest campaign information and allows users to check their point balance.

The app's main services include the home screen, usage details, biometric authentication login, push notifications, campaigns, and points. The home screen provides all important information, while usage details allow users to manage their payment and usage status. Biometric authentication login is quick and easy, and push notifications provide users with necessary information to prevent overuse. The app also offers the latest campaign information and allows users to check their point balance.