4. WhatsApp Messenger ( iPhone ):- WhatsApp is the most popular instant messaging app in the world that lets you send end-to-end encrypted messages to other WhatsApp users.This is one of the most easiest messaging apps in the world, because you don’t need to know other persons’ email id or user name to send messages, mobile number is enough for sending messages.
10 Ways To Make Your iPhone More Secure - MashTips Feb 25, 2019 Lock Messages on iPhone to Protect message conversations Key Features: Erase Texts: Perfect for erasing your text messages to keep your privacy safe and avoid data criminals. All erased text messages cannot be recovered by any data recovery tool. Erase History: Has an advantage of erasing any type of histories on your iPhone. For example, you can erase call history, safari history, and even previously deleted data done by simple means. Top 5 Secure, Safe and Private Messaging Apps | TechBoomers Oct 16, 2017
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miSecureMessages on the App Store