WhatsApp is testing a feature that will let users delete sent messages, according to a tweet from WABetaInfo.
The “delete for everyone” feature is reportedly being tested for Android and iOS, and the necessary server “finally works”.
The report stated that unsent messages can also be deleted from the notification centre.
WhatsApp has over 1 billion daily active users, with 55 billion messages sent per day.

Oh give me strength. Doing that for ages now on Viber.