If the API changes you'd also have to change the model, so I'm not clear how you could reduce that workload ahead of time. Although your API is changing I might assume that it doesn't change that much (a property added here and there?) which might make the changes trivial. Another alternative might be to look at GraphQL but of course if you need to change the data you use in the App this doesn't actually solve the problem - that of a changing API (and you'd need to change the whole backend to acheive this).