It gives background information about the entities behind incoming or outgoing calls by utilizing the user's community-generated content and social networking services.

[3] It was initially introduced publicly at the TechCrunch Disrupt New York 2012, where it launched its application for Android,[4] at the DEMO conference,[2] and at the Mobile World Congress, Barcelona.

[6] In 2014, the company raised $4 million from the angel investors Saar Wilf and Moshe Lichtman and from Giza and Susquehanna venture capital funds.

[7] Amit On was named the company's CEO [8] in 2014, CallApp had five million users along with 50,000 daily downloads, making it one of the 100 leading apps on Google Play.

[11] The app synchronizes the user email and calendar, shows mutual contacts, and includes business information.