A Secure Chat mode provides end-to-end encryption so that only you and your intended recipient can read it. You can share videos, documents and participate in group chats of up to 200 users.MORE: What Is Telegram and How to Use It Open Whisper Systems' Signal (Android, i OS) is another fantastic messaging solution for security-conscious mobile users.
Late last year, Facebook updated Messenger with a slimmed-down interface that reduces the number of tabs so that it's easier to access the chat app's features; more recently, the app added the ability to delete messages from a conversation if you act within 10 minutes.
Look for more changes to come to Messenger this year.
Users can send text, photos, voice and short video messages to their Whats App contacts, and the app has continuously added new features to its toolkit, such as emoji, and fully encrypted messaging between Whats App users.
Recent additions include a group chat feature where only admins can send messages.
The Viber Out feature lets you call non-Viber numbers and landline phones worldwide (for a fee).
The latest version introduces a new interface designed to speed up messaging performance; new features include video group calls that support up to five users and a hidden-number capability in which you can message other users on a limited basis without having to first exchange phone numbers.
Viber uses your phone number as your login, and the app syncs with your phone to help you find Viber-using contacts.
You can use this app to send text, stickers and emoticons, photos, voice and video messages for free to other Viber users.
( Facebook's own foray into the mobile messaging field is Facebook Messenger (Android, i OS), a dedicated messaging app that builds on Facebook's chat network and adds more mobile messaging features as well as extensions and add-ons.