StealthChat vs Signal

Messages can be set to self-destruct after a set time.

The app claims to be the only communication app that encrypts data in transit, on disk and on screen. Encryption in transit is used to make sure no-one can listen in on your conversations even if the traffic is going through their servers, encryption on disk is used to make sure that even if someone gets ahold of your phone and is capable of extracting your messages from it they won't be able to read them and screen encryption is essentially a lock screen that sets in after a set amount of time used to make prevent "shoulder surfing".

Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.

Signal is free and open source software, enabling anyone to verify its security by auditing the code. It's the only private messenger that uses open source, peer-reviewed cryptographic protocols to keep your messages safe.

Signal Desktop can be used on multiple devices and has most features of the Android version, although it still requires you to register with your phone.

Signal supports: emoji, pictures, videos, audio, contacts, any location and GIF.

Allows you to "send: messages to yourself and sync to desktop so you can use Signal as a kind of encrypted Pushbullet alternative

You can easily view all media shared in the chat without scrolling back to when it was shared.

The sender credentials can be encrypted with the rest of the message, leaving only the recipient address readable by the Signal server. Even if Signal wanted they couldn't see who is talking with who by this mean.

Unlike most messenger apps, Signal works reliably in all countries by securely circumventing internet censorship.

Edward Snowden uses this messenger and recommends it to everyone who is concerned about his privacy.