[ig1]

If you don't have product-market fit it's normally much easier to move the product than it is to move the market.

[goodwink]

How do you know if you're in this situation or if you simply haven't been able to get the exposure you need?

[argonaut]

It is not hard to get your product in front of, say, 1000 users. It is not difficult to attend a few meetups of iOS devs and ask them what they think.