How to download and install Messenger for iPhone? I heard it's free and I want to try it.

You can follow this tutorial to download and install Messenger for iPhone:

1. Go to App Store on your iPhone.

2. Search for "Messenger". You see "Messenger" showing up in the search result list.

3. Tap on the "Messenger" icon: . You see detailed information about Messenger for iPhone.

4. Swipe up and down to review the detailed information to make sure that it's the legitimate app:

Messenger
By Facebook Inc.

...
Free
Category: Social Networking
Updated: Jul 13, 2017
Version: 126.0
Size: 266 MB

5. Tap the "GET" button next to "Messenger" title.

6. Enter your Apple ID password, if prompted. There will be no charge to your Apple account, since "Messenger" is a free app.

7. Wait for the download to finish.

8. Go to the Home Screen. You see "Messenger" listed as an app and ready to use.

The picture below shows you how to download and install "Messenger" from App Store on iPhone:

 

⇒ Logout from Messenger on iPhone

⇐ What Is Messenger for iPhone

⇑ Messenger for iPhone

⇑⇑ Facebook - Frequently Asked Questions