Android dev here : big fan of having a what's new containing "we improved things". ALL the majors apps I am familiar with basically launch new features in the

Android dev here : big fan of having a what's new containing "we improved things". ALL the majors apps I am familiar with basically launch new features in the same way : first under a feature flag (e.g. the feature code is in the app but deactivated by default, we control its activation server side). We open up the feature to a small percentage of users, look at how it is behaving (bugs, crashes, impact on metrics) and then decide whether we want to open it up to more users or not. With such a system where your version number does not mean much, at best release notes would be "we added a new feature, you might or might not see it".