The module needs access to other application's data which is prohibited in android except in rooted devices. Only possible solution is to embed the module in android operating system, which needs building with the android operating system. This includes android operating system modification. I have done this kind of work, and not this. So this takes around a week. Also higher cost. Anyway WhatsApp and similar applications has their data encrypted. There are lot of work in this project I think. Otherwise I don't think I have understood the project, so please don't offer me. Thank you.