Architecture and urban design apps are appearing so fast its hard to keep up with the latest new site to investigate city history and growth. But a new one—Archipelago Town-lines—is the result of a 3 year-long research on three key places: Berlin, Beirut, and Venice. It uses original photo galleries, video, and audio content and interactive data visualization features, as a guide for new urban geography, history, and lifestyle of these three very different cities. These places are then place holders for the analysis of contemporary urban trends, in order to propose a new possibility for growth. A second app second section puts forwards a new model for urban growth based on 9th century Venice and the figure of the archipelago whose archetype is to be found in a place built in the impossible like Venice, namely a place in which un-built areas have the same importance as built ones. The third section of the app features video interviews of prominent architects, urban planners, and academicians, specifically produced for it, that suggest imaginary path and different reading of the urban phenomenon stimulated by the app itself. Archipelago Town-lines has been released in English as an app for the iPad. In April, it will be available for Amazon Kindle Fire and all tablets operating on an Android platform. It's worth a download!