"When you activate or otherwise use the Service or interact with us on our website, we may collect the following information: geo-location, IP address, device ID or unique identifier, device details (including: device manufacturer and type, device model and name, device hardware and settings), keywords and meta data of incoming and outgoing calls and messages, installed apps information, ID for advertising, ad data, operating system and operator."
CallApp collects installed apps, call/message metadata, device hardware details, advertising IDs, and other device data that goes well beyond what a caller ID app requires for core functionality.