There is only one way to validate a concept. Talk to potential users and customers (customers could be different than users). Speak to as many as you can. Ask them if they find the value proposition meaningful. But first define your value proposition well and articulate it in a nice, crisp sentence.
If the intended users like the concept, do some research to see if there are enough number of such users/buyers for you to make this venture commercially viable. (In all concepts, users need not be the ones who pay. E.g. ad supported models… but in those make sure you speak to someone from the media buying industry to assess what the revenue potential could be).