WhatsApp is working to provide a message timer feature with existing chats, not just new chats, and is redesigning the security page with the latest build of the WhatsApp desktop beater. WhatsApp is already working on a redesigned security page for the Android version.
Currently users can create new individual chats by turning on the message timer feature by default, but work is currently underway. For Android Beta, users will be able to send their old reserves to a timer. WhatsApp feature tracker WABetainfo reports that WhatsApp is working on a new beta build for its Android app with version number 18.104.22.168. Those who have registered for the beta program will receive updates soon.
The new option will allow users to select and activate the message timer in multiple existing chats at the same time, and put new individual chats in disappearing message mode. WhatsApp users will have the option to choose from a period of 24 hours, 7 days or 90 days. Once activated, selected chats will start receiving missing messages. Within 24 hours to 90 days depending on the option chosen.
This feature is currently only available in beta build, WhatsApp has not announced when it will see a wider release. Stable versions of both Android and iOS.
WhatsApp is testing beta builds or new designs for WhatsApp desktop clients. It is reportedly redesigning the desktop app’s security page, which will inform users about various aspects of the app that are covered by secure end-to-end encryption. This will include text / voice messages, location sharing, audio / video calls, shared photos, videos, documents and status updates. New designs may be available in future updates.