> I guess sometimes you get lucky. I'll assume in good faith that you didn't mean it this way, but this comes across as incredibly insulting to OP. OP didn't g

> I guess sometimes you get lucky. I'll assume in good faith that you didn't mean it this way, but this comes across as incredibly insulting to OP. OP didn't get lucky at all. He created something that would appeal to a large audience, he found that audience and he told them about it. End of story. Frankly, it's about the idea, the size of the audience, and the sales pitch. "Tinder for movies" is a way easier sell for most people than "iPad calculator." I'm not even sure who the audience is for the latter. The subset of people who need to do calculations on their casual web-browsing device but can't use the calculator on their phone or one of the many calculators online? That has to be a very small group. The craftsmanship and the experimentation are great, but it's easy for us devs to stay inside our heads. "This operating system doesn't have a calculator" by itself just isn't a compelling reason for most end users to want one. My washing machine doesn't have a calculator, but that doesn't bother me because the kind of work I do with it doesn't call for a calculator. If it does, I reach into my pocket for my phone. So I think we're doing a disservice to our own understanding of how marketing works if we attribute this to luck.