Using the free version, the user will be able to sell and share sales receipts by saving the data on the device itself.
In "Premium" mode, data is recorded on servers in the "Cloud", and can be accessed from any compatible device.
Functions:

Free Mode:
Product Registration;
Service Register;
Payment conditions;
Customer base;
Point of sale;

In Premium mode you will still be able to count on:
System access control via users;