Signal vs Tasker

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.

Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.

Tasker has the ability to create custom applications, effectively replacing multiple installed apps in your phone with tasks that are triggered automatically. What's even better is that they will be custom tailored to fit your specific needs.

With Root access it can also dabble with system software which other apps are not likely to achieve at the moment.

Tasker allows exporting workflows you've created as standalone applications that can then be shared or even put on the Google Play store.

Tasker has awesome plugin support to connect with hardware that usually requires installing specific apps. For example, it has a plugin for Pebble smartwatch so that you can automate tasks that require using Pebble.

The dev does not keep bringing out revised apps expecting you to pay each and every time; the same app has been developed consistently for nearly a decade.