I've made a few apps. Some were even quite popular. But eventually they all lost traction. So I agree - marketing is a _very_ large part of app development that

I've made a few apps. Some were even quite popular. But eventually they all lost traction. So I agree - marketing is a _very_ large part of app development that I wasn't interested in/neglected. To make an app successful, it really needs to be _the_ focus, with constant support and updates.