There seems to be a negative reaction to apps using IAP as a paid upgrade, though.
I, personally, like the business model as long as the app is very clear about what is offered with and without the IAP, but I have rarely seen a review mention this practice favorably.
I, personally, like the business model as long as the app is very clear about what is offered with and without the IAP, but I have rarely seen a review mention this practice favorably.