While most of our WhatsApp conversations are with friends and family, we often use it to talk to people we do not know (eg a store). Because of course we do not need to save such conversations forever, it is better to send the missing messages to the recipients.
WhatsApp offers the self-destruct function for conversations. When you enable it for a specific group or private conversation, messages are automatically deleted from your phone and recipient after one week. See how you can do the necessary settings.
Now, open the "WhatsApp" application on your iPhone or Android device and enter the group or private conversation you want to set for self-destruction on the "Chats" tab.
Tap the recipient or group name at the top of the conversation to visit their page Profile of.
Select "Disappearing messages".
Note: In a group chat, only administrators have the right to set this setting.
Select the "On" option to enable messages to disappear in this conversation.
Now, any text or media sent to this conversation by you or the other person will deleted after a week.
However, messages sent before this change will not be affected. You can turn off the missing messages feature by making the reverse setting.
Keep in mind, however, that this does not prevent chat members from pulling screenshot in conversations or create backups of the media elsewhere. In addition, his choice at export of conversation will still be available.