Nowadays technology progresses at an unprecedented rate. One of the most important technologies we use at the day of today is the smartphone, and more specifically, smartphone applications. The latest generation of these smartphones comes with an immense variety of applications to get you started, form email and photography editing to navigation, or weather and health services. However, every one of those default apps has at least one alternative on the app stores, and often, there are a dozen more that can represent a huge upgrade. Amongst the many applications that are offered to us daily, the ones that offer a service based on the location of the user are gaining popularity. The following report embraces a precise and complete recapitulation of the all the work fulfilled during this project. Its principal goal is to enter in the applications market with a new idea, trying to fill what we have seen as a little hole in it. As students, we realised there was one problem almost every student in the world has faced at least once: not finding a seat when he/she goes to a library to study. In this present work a solution to this problem is proposed. This solution is called BibApp. An app that can tell its users the occupancy of all the libraries in the city in real time and provides the user with a lot more useful information about the libraries. The app uses a map and the localization of the user to try to provide him/her with alternatives to the fully occupied library he/she wanted to go to. For that matter, we have analysed the state of the art of the necessary technology to implement our solution. Later, we have conducted a market study of the different initiatives that exist or have been in the market and that can be used as an inspiration for the development of BibApp. Finally, we have designed the application and detailed the business plan of our project.