A free program for Android, by mixxapps.

WhatsMock is the best prank app for making fun of your friends and family, and it is easy to use.

With this, you can create fake conversations. The app features a realistic chat interface, making it very believable. You can make your friends think that you are chatting with the girl you like or anything like that, but in reality, you are controlling both sides of the conversation.

Moreover, you can choose the type of message you want to send: an emoji, a sticker, or a video. You can also change the content of the message and the sender’s name.