StealthChat is described as 'new secure app for calling and chatting with your friends and partners. With advanced encryption technology, your phone calls and chat messages are private. All calls and messages are free over cellular and Wi-Fi connections' and is an app in the Social & Communications category. There are more than 50 alternatives to StealthChat for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Windows. The best alternative is Telegram, which is free. Other great apps like StealthChat are Signal (Free, Open Source), Skype (Freemium), Zulip (Free Personal, Open Source) and Viber (Freemium).
Signal is a messaging app with an unexpected focus on privacy, combined with all the features expected from a modern IM app. Signal has received a lot of praise from all around the world for its security and privacy-respecting technologies.
Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice call over the internet. Users can also call landlines and mobiles at competitive rates using Skype credit, premium accounts and subscriptions.
With Viber, everyone in the world can connect. Freely. More than 460 million Viber users text, make HD-quality phone and video calls, and send photo and video messages worldwide over WiFi or 3G - for free.
Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG]. [Note] **You can download the compiled apk for free from F-Droid**: ...
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs. Line users exchange text messages, graphics, video and audio media, make free VoIP calls, and hold free audio or video conferences.
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. You can connect to your existing accounts on Facebook or Google, create new accounts on public XMPP servers(including via Tor), or even connect to your own server for extra security.