With Signal, you can send messages, make voice and video calls, and share files free of charge. The app is also great for staying in touch with large numbers of people, as it supports group chats ...

Your iPad will need to be running iOS 15.1 or later for the WhatsApp app to work, but considering we’re probably going to see ...

And essentially, any two people who have the Signal app can use it to exchange messages or call each other. The systems for protecting classified communications, on the other hand, actually try to ...