I need to send notifications to my workers' phones. So i have a server in wich i will write text messages (text files); Every worker have an application that looks (with background activity) on the server and when a new file is detected a notification is showed, containing my text. My workers are divided by categories (placeA, placeB, etcc), so at the first time they open the app, they have to select one or more categories (that will represent different directories on server, like "www.?????.com/placeA/.txt", "www.?????.com/placeB/.txt") from which they want to take notifications (and be able to modify it later using settings). I need this both for Android and iOS and need the source code, so that i can modify the category list and the server url when i want to.. i don't care much of graphics: it's really just a simple notification app!