WhatsApp rolled out ‘Delete for Everyone’ feature for everyone around the world, but using a third party app you can retrieve the deleted messages.
A Spanish Android blog Android Jefe claims that the deleted messages can be easily accessed by anyone regardless whether the sender has deleted it. "What we found is that the messages are stored in the notification register of the Android system. So, it's just a matter of entering that record to see the messages that the other person deleted," the blog said.
According to the blog, users who have Android 7.0 Nougat or higher version can simply read the deleted messages via a third-party app called Notification History. One has to download the Notification History app from Google Play Store, then they will be able to see a message that has been deleted in the Android Notification log.
“What we found is that the messages are stored in the notification register of the Android system. So, it’s just a matter of entering that record to see the messages that the other person deleted. The Notification History application is a shortcut to that record,” the post reads.
You can use another third party launcher like Nova Launcher, with this you don't have to download a third party to access deleted messages. Press the home screen for a long period of time, and then click on Widgets, tap on activities, then Notifications log will launch to view notification log of the system.
However, both these third-party method work for the first 100 characters only. It means that users will only be able to read the first 100 characters of the deleted messages, and they won't be able to see the deleted photos and videos.