Android TEXT CHAT app with expiring messages (see project details)

Android TEXT CHAT app with expiring messages ********** Project details: We need to develop an Android TEXT CHAT app (no pictures, no videos, no sounds at the moment) with the following features: The app must be developed for Android OS The app must use Facebook for user registration The app must use the internal smartphone contacts list The app graphics must be very clean and simple The chat will be only for text messages The message MUST EXPIRE after a user-specified number of seconds (i.e. 1,5,10,15 sec and so on) STARTING FROM THE USER SENDING TIME not after the receiving user reading (Like SnapChat) Pls note that this is the mandatory requirement The message MUST EXPIRE after a specified number of second starting from the user sending time. After the project assignment we'll release further details about the apps ***** MANDATORY REQUIREMENTS ***** At the end of the project the programmer MUST release the FULL SOURCE CODE Due to previous non professionl developers we'll release 20% of the sum at the project start and the remaining ONLY FOR WORK COMPLETED AND DELIVERED Because most of the details are ready it should not take too long for an experienced programmer to finish the project and the deadline is 2 weeks from the project acceptance. ********************************************* ***** NOTE ***** Potential bidders are requested to download the application to try and control the various features and to request further information and clarification before making their offer. Once awarded the project, the deadline for delivery of the same is 3 weeks. The maximum time limit of 3 weeks for the delivery of the project can not be extended Only serious bidders The developer must send the intermediate work to us so we can check it for any bug or functions misunderstanding before the final release At the end of the project, if satisfied by the work of the developer, we definitely need to establish a relationship of continuous type with the developer for other applications tailored for devices with both iOS and Android operating systems