One Card is a free Android app developed by OCSI Soluciones S.A de C.V, designed to provide innovative payment solutions and value-added products such as the SaaS Smart Invoice for expense management. It is exclusively available for One Card's payment card users.

The app offers features like creating an account, checking your balance, and viewing your latest transactions. It also allows you to have up to three One Cards. One Card's payment cards can be used in any store that accepts credit/debit card payments, now just affiliates. However, acceptance is related to the product type and business rules.