Perhaps you could initially target one of these groups and try to make Letz (+1 for that version of the name) the best app for their specific use case.<p>Also, one trick to make sure people in interviews are being honest with you is to get them to commit to a concrete action. It can be as simple as getting their e-mail address and then sending them an e-mail with a fake link just to see if they click on it, or as hardcore as asking 20$ in advance for a &quot;premium access to the finished app&quot;. This way you&#x27;ll see if they REALLY need what you are building.