Responsive web design websites are always adapted to the respective screen size. The content corresponds to the normal desktop version and information can be shown or hidden. This strategy is most suitable for new web projects.
Advantages of this approach:
This is the approach we use most often, and is also the standard for many new web projects today.
Mobile web apps look and behave very similar to a classic app for smartphones. That means page transitions can be animated, there is a toolbar at the bottom of the screen, etc.
Mobile web apps are mostly used for specific business processes and are often like a separate product as an ideal supplement to the actual website.
Advantage of this approach:
The approach of a separate mobile website is often chosen if nothing can be changed on the existing website. As a result, the scope of the mobile website can also differ from the desktop version.
Advantage of this approach:
If device-specific functions are required, such as access to address books or other information, it is worth developing a separate app. An app must be developed separately for the respective operating system (Android, iOS, ...).
Advantages of this approach:
In the fall of 2013, Michael Salzer wrote a bachelor's thesis on the topic of “Mobile Web Strategy”. A mobile web strategy was developed on the basis of an existing website of an international scientific publisher. The thesis was awarded top marks and its implementation led to sustainable success. Since the introduction of the responsive website, mobile visitor numbers have increased by over 20%.
If desired, the Bachelor Thesis can be submitted under Contact can be requested.

Michael Salzer
WordPress professional, Apple fan and irregular jogger.