Messenger has this feature of Secret Conversation to send disappearing messages
How to send the disappearing messages: You can send encrypted messages on the Facebook messenger app. There are certain steps to be followed to send these messages.
Step 1: Go to Google Play Store. Then update the messenger app from there.
Step 2: Then go to the user's profile and click on the name.
Step 3: You will have to select the option written Secret Conversation.
Step 4: A chat panel will open. Just type in the message over there.
Step 5: Then you can easily set the duration of the timer.
Step 6: You will see that the message has automatically disappeared in the time that you have set in the timer.