Today it is common for anyone to have a smartphone, a tablet or even both devices. This opens new possibilities for payment systems in the service sector, in catering, establishments, tourism, etc. The aim of this project is to develop an Android application that allows to pay in restaurants, via mobile devices or tablets. We will create a web service that will allow us to connect to databases, which will store all the information you need to display on the screen of the user. To accomplish this, we will need to set up our own server and our own database; we will do this on an operating system called FreeBSD. Once we have prepared all requirements we will create our application in Android. In our case, we use the set of tools that Google offers in the Android developers' page called ADT plugin (Android Development Tools). The application connects to the server by using JSON data format (JavaScript Object Notification) because it is more efficient. In order to pay, a set of tools that are called mobile payments (MPL) is commonly used. This tool allows us to pay through PayPal platform, by allowing the usage data from our credit card / debit card directly. Once verified the payment, we will send the order details to the restaurant so you can prepare the menu which the customer has chosen. Also, another option which could be included is to comment on some social networks such as Twitter and Facebook among others.