Install Signal on your smartphone now!
— Are you using an iPhone or an Android-based smartphone? Have you installed Signal yet? If not, please stop what you’re doing and install it now! iPhone Android Why Signal? I owe a debt of gratitude to my good friend Dan for bringing Signal to my attention last year. Actually, he told me about its predecessors TextSecure and RedPhone for Android, which were just recently combined into a single product. Unfortunately, I initially confused the two with similar products with slightly different names and took no action.