Watakon is a free Android app developed by KMB Technologies that falls under the Utilities & Tools category. It allows users to send WhatsApp messages without adding contacts to their address book. This feature is especially useful for those who need to send WhatsApp messages to people they do not know or do not want to add to their contact list.

The app is straightforward and easy to use. Users can copy the phone number they want to send a message to and paste it into Watakon. They can also manually enter the number into the app. Once the number is entered, users can tap the "start chat" button, and Watakon will automatically open WhatsApp and start a chat with the entered number.

Watakon also offers a history feature that allows users to view previously added numbers and remove them if no longer needed. Overall, Watakon is a convenient tool for sending WhatsApp messages without the hassle of adding new contacts to your address book.