UX, UX Design, iOS, iPhone, Usability.
least they offer the functionality. Built-in “unread” support Facebook Messenger (120.0) LinkedIn (9.1.32) Skype for iPhone (6.35.1) WhatsApp (2.17.22) Missing “unread” support Apple Messages (iOS 10.3.2) Twitter Messages (6.79.1) Viber (6.9.1) Note: Verified on iOS versions of the applications