Doc Man : Document manager for WhatsApp

We share a lot of informative documents as pdf & excel sheets in various whatsapp groups every day. In order to manage all these documents easily from a single place, I have created this little app. Initially, it was meant for my personal usage, but later thought publishing it would help more people since WhatsApp's doc management is very basic. The app is still under development & any issues you face, please reply me in the mentioned mail id. Cheers