The ЕТК application is designed for users in the Чувашская Республика, allowing convenient management of transport cards within the cashless payment system. This free Android app enables users to recharge their transport cards anytime, eliminating the need for physical visits to post offices or self-service terminals. With secure payment options through the fast payment system and mobile banking, users can enjoy a hassle-free experience without long queues.

Key features include balance checking, direct and deferred card top-ups, and the ability to record top-ups via NFC. Users can save multiple card numbers, find nearby service points, and access news and FAQs. The app also provides customer support. Internet access and app registration are required for full functionality. For devices lacking NFC support, balance checks are possible via card number, but only deferred top-ups are available.