Landing page might be overdone, but you follow up with talking to users etc. The mechanics may differ, but the point is the same. Validating the idea with real

Landing page might be overdone, but you follow up with talking to users etc. The mechanics may differ, but the point is the same. Validating the idea with real customers, finding those customers, getting them to be interested, is exactly the hard part. Once you have a way to reach your projected customers, once you've even determined they exist, then you should start building. Building first, then wondering who the customer is, or how to reach them, is a waste of time and money.