General answer: - are you solving a problem you feel? - are you solving a problem somebody else feels? In your specific case, I would talk to your potential us

General answer: - are you solving a problem you feel? - are you solving a problem somebody else feels? In your specific case, I would talk to your potential users and see if they bring location part as a problem (but dont ask them directly if that is a problem, ask them what their biggest problem is) Speak to at least 10 people and see what you learn. Also a great and very straightforward (also short) book on the topic: Talking to humans