Not necessarily, if your app can potentially serve different markets with different demographics, it may be beneficial to market to each market individually. Since app interface often serves as a marketing tool, it is important that it resonates with its target audience. This means having a different interface for the same set of functionalities depending on your audience may be prudent.

On the contrary, if you are simply trying to create variations of the app for a single market by short-cutting user testing and hoping that one of the interfaces will generate more interest, you are then over-saturating the market and may actually hurt yourself by creating unnecessary confusion for your users. I would suggest looking into what other apps your target audience is using and working off that to create a single user experience which would resonate with them.

My name is Michael and I am an Entrepreneur, Adviser and Innovator in a Small Business and Technical Solutions arena. I'd be happy to offer you additional assistance if you are interested.