send Viber messages to my mail

i need an app that i can install in my childs phone and i can track viber messages from that phone. example it will send to me( mail or to upload to ftp or...) all messages they send or recive from viber. I dont need any special app coz it will be used just for my childs (personal use). if u like u can send me just apk file and not source code. i need app that i will just install and it will send me messages from viber whatsap