Whatsapp who dosen’t use whatsapp? Everyone who has cell phone use whats app. Whatsapp is one of the must have apps. It is totally free and there are no inapp purchases. You can message anyone for free who has whatsapp. You can even call using whatsapp and recently whatsapp even added video calling feature which made whatsapp even better. You can send files to your friends such as a song or a video or a text document.you can group chat in whats app. Whatsapp is the one of the greatest app ever created