Switching to Signal? 5 Tips and Tricks You Need to Know From disappearing messages to screen lock and more, here's what you need to know about the app. By Gopal Sathe | Updated: 10 January 2021 15:54 IST Signal app is seeing a lot of new users switching over from WhatsApp Highlights Elon Musk tweeted Use Signal which helped drive interest in the app It quickly became the top messaging app on Google Play in India Signal is seeing a huge influx of users who are switching from WhatsApp, as users want to protest about WhatsApp's new privacy policies, a movement that also got a significant boost when Tesla boss Elon Musk tweeted “Use Signal”. But if you've just started using the privacy-focused messaging application then there are quite a few features that you'll want to know about.