As mentioned above this app is really able to show you all the notifications deleted/unsent messages from any social app.
Actually it reads all the notification and store within the app.
This app works even when the phone is on sleep mode.

First Click on the Start button anf allow permission..
Now any notification from any app is recoded in the app.
Just tap on Show button to view all the notifications with app name with time and the sender name.
Even you can clear all the stored messseages by clicking on the Clear button.

If you face any broblem then again click on start and give permission again.

Keep using my app.
Thank You.