You can build for months before finding out nobody wanted it. ShouldBuild reads what real users already complain about — across the app stores, Reddit, Hacker News and the open web — and hands you a build / don't-build verdict backed by quotes you can click. Keep the findings worth keeping, turn them into a concept and a backlog, and every Monday see what moved: new rivals, new complaints, and whether what you shipped made its complaint go down. 7-day free trial, no card needed.