Проездной СПб. Баланс БСК и по is a free Android application developed by NixesEA under the Travel & Navigation category. It allows you to check the balance of your travel card anytime and anywhere without an internet connection. The app supports Plantain, Plantain Daily, and BSK cards and it automatically launches when the card is presented.

In addition to checking the balance, the app also provides a History tab where you can view the information related to your card. The design of the app is minimalistic, and it does not require any registration or SMS. There are no ads in the app, and it has the functionality and access keys necessary only for reading data on the map. All you need is a phone with an NFC sensor and a travel card to use this app.