Quick answer. A mobile app offers the deepest experience but demands a download, ongoing updates, and fighting app fatigue; RCS delivers much of the app-like experience — rich cards, buttons, two-way flows, loyalty, ordering — inside the messaging inbox with nothing to install. Apps win when you need offline features, device hardware, or a full product surface. RCS wins on reach and zero friction: most customers will never install your app, but they’ll read and tap a branded message.
This is central to SimplyRCS’s loyalty thesis: many loyalty and engagement use cases that historically required an app — points, rewards, reorders, reminders — can run over RCS, reaching the majority who never download the app.