An unsend button can remove a database object. It cannot reverse delivery, notification, interpretation or memory. Designing deletion means deciding who controls a conversation after it has happened.
Duolingo, Snapchat, Apple Fitness, Strava, Finch, Shopee, GitHub, and other apps use similar streak interfaces to create very different forms of discipline, care, obligation, identity, and commercial repetition.
Optional Google Analytics and Microsoft Clarity measure content performance and usability. They load only if you allow them. Form values, email addresses, and chat messages are never included in analytics events.