WhatsApp tests delete feature to recall messages
Facebook owned WhatsApp is testing a feature which will delete messages sent erroneously to an individual or in a group chat within five minutes.

WhatsApp tests 'Delete for Everyone' feature to recall messages
According to WABetaInfo, the test will allow the sender to delete the message for everyone, while it will also be updated in the Notification Center too. WABetaInfo claimed that the feature will be available for both iOS an Android users.
Chat app Viber released a 'Delete for Everyone' feature in 2015.
Elsewhere, Facebook recently furthered WhatsApp monetization efforts with verified business pilot.