Signal is a free, privacy-focused messaging and voice talk app that can be used on Apple and Android smartphones, and via desktop. It is an end-to-end-encrypted instant messaging and SMS app that allows users to send direct or group messages, photos, and voice messages across multiple devices. Signals strongest security features include end-to-end encryption, independent verification of contacts, and the ability to schedule sending messages. Signal is designed for anyone who values security and privacy, and it is a great choice for anyone in any line of work that needs to communicate securely. Some of the drawbacks of Signal include the need for a phone number to join, the fact that it is not bulletproof, and the fact that it requires a data connection. Overall, Signal is a secure and private messaging option that is free and easy to use, with strong end-to-end encryption that keeps your communication completely private.