God, I get that one, unsolicited, All. The. Time. It may be the only kind of unsolicited "idea for a product" I've ever gotten, actually.
"You make apps? I have a great app idea that'll make you rich! All of us in [profession] would use it! You see... [explains idea].... It would save me hours every week and no one's done it yet, for some reason!"
Me: searches the App Store You mean like any of these first five results that are all literally the exact thing you're describing, are targeted at your profession, and that you want sooooo much that you've never even bothered to search for it and plunk down consults screen $14.99?"
So true. My experience is that those people have "one weird requirement" that is unique to them that other tools don't include so instead of getting 90% of the the performance benefit, they'd rather complain and not change that one step. What they really want is for you to automate their exact current process. I had a friend of a friend pitch me something like that and they had the whole "and you can sell it to everyone in our industry". There were upset when I pointed out that no one else in that industry has their specific process and requirements. They just wanted it for free.
"You make apps? I have a great app idea that'll make you rich! All of us in [profession] would use it! You see... [explains idea].... It would save me hours every week and no one's done it yet, for some reason!"
Me: searches the App Store You mean like any of these first five results that are all literally the exact thing you're describing, are targeted at your profession, and that you want sooooo much that you've never even bothered to search for it and plunk down consults screen $14.99?"