4. WhatsApp
Surprisingly, WhatsApp is on this list, and not by mistake. WhatsApp benefits from Open Whisper’s end to end encryption system, which means that your text messages are safe and sound, intercepted by nobody. Since it’s one of the most popular messaging apps, by making it even more secure, WhatsApp just secured (hah) itself a place among the well-known privacy-focused applications for Android. There’s not much to the app, but you can call people and text them, see if they’ve read your texts and what their moods are. It’s a pretty basic messaging system, which is probably why it’s so popular, besides the end to end encryption part, of course. WhatsApp is free in the Play Store.