Registro is a free Android app developed by Rodrigo that allows small business owners, distributors, and vendors to keep track of their customers and products or services sold. With this app, you can manage different prices for different customers, keep track of each customer's debt, and make sales on credit or cash.

One of the best features of this app is the ability to consult various statistics and view a history of actions taken. This allows business owners to make informed decisions and analyze their business performance. The app is user-friendly and easy to navigate, making it ideal for those who are not tech-savvy.

Overall, Registro is an excellent app for small business owners who want to keep track of their sales and customers. It is a must-have for anyone who wants to take their business to the next level.