Right Buy is a free Android application developed by Fabio Goncalves Cavalcante that helps you keep track of your purchases. It allows you to take a photo of the product you want to buy, along with its price and quantity, so that you can keep track of your expenses. This app is especially useful for those who want to avoid errors in the amount charged for their purchases.

The app's interface is user-friendly and easy to navigate. Right Buy is available for free on the Google Play Store and can be downloaded and installed on any Android device running Android 4.4 or higher.