WhatsAdd is a free Android app developed by LouisLam.net that falls under the category of Social & Communication. It allows users to start conversations with anyone on WhatsApp without having to add them to their contact list, which can save a lot of time.

With WhatsAdd, users can simply enter the phone number of the person they want to message, and the app will open a chat window directly in WhatsApp. This feature can be especially useful for those who use WhatsApp for business or frequently communicate with people they don't want to add to their contact list.

The app is user-friendly and straightforward, with a simple interface that is easy to navigate. WhatsAdd is a great solution for those looking to streamline their WhatsApp communication and save time.