The application allows Ecotech's customers to become familiar with the company's offers thanks to notifications sent to their phones and displaying Ecotech's offers and promotions. The user must allow notifications to be sent about a new offer. In addition, each user can download and view their latest invoices. The application downloads the latest invoices assigned to the user and opens them immediately on the user's phone. For this reason, the user is asked to authorize the external memory in order to open the invoice he has just downloaded. The customer can quickly communicate with the company via the contact form in the application and the telephone numbers provided in the application for offers and until the alarm is cancelled.