This is the view of SAP consultants and may be appropriate for some companies. There is no question about that.

However, those who want to focus less on system logic and more on physical process requirements in their discussions about mobile warehouse solutions should definitely consider a third-party solution.

And: The fact that only a few customers have used third-party solutions so far will be relativized in the medium term with the increasing spread of EWM systems.

In addition, Bauer, Kappauf, and Persich also point out challenges.

For example, securing WLAN interruptions (according to the authors, one of the most important functions of a mobile solution). When using the technologies promoted in the book, this can only be achieved with separate, special industrial browsers that can display and partially buffer the generated HTML web pages.

In our view, an optimized mobile solution should always take into account the requirements dictated by physical processes. These may well deviate from the SAP EWM system logic or integrate both sensibly into one app.

In addition, the authors address further limitations that, from a logistics perspective, may well argue in favor of a third-party solution:

“SAP EWM itself does not yet offer support for optimally connecting devices without function keys to the SAP EWM system.” This rules out the use of full-touch devices or makes it possible only at increased expense.
"... EWM MOBGUI is currently only interesting in a cloud environment." In addition, the technology has only been tested with the Zebra MC9300 and a specific industrial browser.
“Experience also shows that SAP Fiori is not yet recommended on mobile devices from a performance perspective. In the context of SAP EWM, there are still no plans to provide SAP Fiori apps for mobile devices as standard.” In case of doubt, this means deviations from a Fiori-only strategy or high development costs.

In addition to mobile warehouse solutions, other possibilities for optimizing EWM processes are also interesting. The authors describe the use of pick-by-voice via RF, RFID-controlled processes, the use of wearables, and the connection of scales.