In some ways web apps act like this: all (most) of the buisness logic and data is on the server.
And you get the data through API calls - so in theory one can build your own UI on top of a known service. There are rare examples of this done succesfully (for HN for example), but usually you won't get very far in a reasonable amount of time, because often it is a mess behind the shiny UI. (And because this is not encouraged behavior by the service provider)
And you get the data through API calls - so in theory one can build your own UI on top of a known service. There are rare examples of this done succesfully (for HN for example), but usually you won't get very far in a reasonable amount of time, because often it is a mess behind the shiny UI. (And because this is not encouraged behavior by the service provider)