Today I did some more digging, and found out that the idea is far from unique. I found some projects/apps that are mostly the same as our would be, but almost all of them are dead, it seems like no one is using them.
Now, I'm wondering what should we do. Why are these apps dead? Is it the realization or the idea? If the first, there might be chances that we can create something good that people will love, but if it's the idea, then maybe there is no market for that and we should abandon it too.