Signal

Signal is a popular communication app used by millions all over the world, offering instantaneous and cost-free messaging services, as well as access to a myriad of cutting-edge features that will keep you connected to the people who matter most. Signal prioritizes privacy-preserving technology, ensuring that your conversations are always secure through end-to-end encryption powered by the Signal Protocol™. With fast, reliable message delivery even in low-bandwidth areas, Signal is optimized for operating in constrained environments. As a completely independent nonprofit organization, Signal does not feature any advertisements, trackers, or unwanted noise. By using your existing phone number and address book, you can securely chat with your friends and family, using features like enhanced audio and video quality, the ability to switch to the dark theme, custom contact alerts, and image editing options. For more information or support, visit https://support.signal.org, follow @signalapp on Twitter, or check out the Signal source code on https://github.com/signalapp.