FEL is an Android application developed by the Superintendencia de Administración Tributaria, a government agency from Guatemala, Central America. The app is designed to allow Guatemalan taxpayers to issue and receive their electronic tax documents (DTE) for free under the Online Electronic Invoice System (FEL).

With FEL, users can easily manage their electronic invoices and access their billing history. The app also provides real-time notifications for new invoices, making it easier for users to keep track of their transactions. Additionally, FEL offers a user-friendly interface and straightforward navigation, ensuring a seamless user experience.

Overall, FEL is a reliable and efficient electronic invoice system that streamlines the billing process for Guatemalan taxpayers. It is a valuable tool for businesses and individuals looking to simplify their tax-related activities.