A free app for Android, by Farmis.

Sprayer calibrator is a handy app to every farmer to help them choose the right pesticide nozzle for their crops and fields. It allows you to easily set up your crop protection program and to get real-time information on the amount of pesticide that is being sprayed in your fields. It is also useful for farmers who want to mix different types of pesticides to get a better result. The app has a special section for all types of pesticides, weeds, and insects, and also a section that allows you to mix them together.

The app has a very simple and easy-to-use interface. It is developed to help farmers with all the necessary information to get started with their sprayer program.