I would be delighted to assist you with this.
A bit more info would be helpful about what you want this app to look like. The images of various fruits are not of great assistance.
Must this run on a smartphone? Any reason why, say, a Java or Python application is unacceptable? Does your professor teach that such an app is a valuable use for a smartphone?
That's bizarre, but, of course, I'm not the professor. What I think of him I won't share.