What mobile app concepts are the most relevant and popular right now?

Question

Startups

At the university in the discipline "Mobile applications" we were given the task to make a project on the presentation of a mobile application: develop a concept, explain why and for what target group it is needed, think over a method of monetization and suggest through which advertising channels to promote it.
So far, nothing interesting comes to my mind, only hackneyed options. Therefore, I decided to ask you, Toaster users, which mobile application concepts are the most relevant and popular right now?
Thanks in advance for your reply.

Answer 1

For example, go to kickstarter and search for "mobile app".
Sample result: https://www.kickstarter.com/projects/1380556829/at...
Read sections Market/Opportunity/Solution