ICMS-ST Econet is a free Android application developed by Econet Editora Empresarial. It falls under the category of Business and Productivity and is designed to provide all the necessary information about the Substitution Tax to business owners. This application is exclusively available to Econet clients only.

The app is equipped with several features that enable users to access Substitution Tax information with ease. It provides a list of goods that are subject to Substitution Tax, which is separated by state and can be accessed through the NCM code or description. The app also provides information on the legal basis for each merchandise, the internal and interstate MVA percentages, and the Conventions and Protocols that the respective states have signed in relation to each product. Additionally, it provides information on the tax rate and any available tax benefits.

The app also features a calculator that automatically determines the ICMS value to be paid as a Substitution Tax, based on the information provided. Lastly, the app offers a section for frequently asked questions, where the Econet technical team provides answers to common doubts about the Substitution Tax regime.