Signal is an open-source, encrypted messaging app known for its commitment to privacy, favored by developers, journalists, and security experts. The app prioritizes user privacy by default, encrypting all messages, calls, group chats, and files, and limiting metadata collection through features like sealed sender, disappearing messages, and view-once media. Users may face challenges such as difficulty in registering (e.g., requiring a VPN for access) and a sparse contact list, which can lead to feelings of isolation. Signal operates as a nonprofit, prioritizing user privacy over monetization and advertising. The app is designed for those who need stringent encryption, though some users may find services like WhatsApp sufficient for their needs. The experience of using Signal can create barriers to engagement and connection, despite its privacy benefits.