Chapp is a free messenger application developed by Chapp Inc. that offers top-grade security and usability for users. It is an Android-based application that aims to provide users with a secure and private messaging experience. Chapp's unique feature is its ability to separate business and personal messaging. It allows users to have two separate tabs for personal and work communication, which helps in managing their contacts and communication in an organized manner.

The application uses end-to-end encryption to ensure that messages and media shared between users are thoroughly secured. Chapp stores each user's contacts and messages locally on their device, and the keys to decrypt the communication are stored on the user and their friends' devices only, never on the servers. This ensures that the sender and recipient are the only ones who have access to the correspondence.

Chapp's work profile is designed for business professionals who want to keep their business communication separate from their personal communication. It allows users to communicate with colleagues in a separate space from all other communication, which helps in improving the quality and efficiency of business correspondence while keeping it encrypted.

Overall, Chapp is an excellent messenger application that provides a secure and private messaging experience for users. Its unique feature of separating business and personal communication makes it stand out among other messaging applications.