I think this is an important factor. I am quite willing to pay $3 for an app that looks cool enough that I want to try it out, but wouldn’t pay $30 without trying it first unless it comes very well reviewed.
Is it better to have the revenue for one $30 purchase after a trial or 10 people who impulse purchased it for $3?
Trials might be important for apps that need to cost $100 or $500, but for more reasonably priced apps it is not totally obvious that they would make a huge difference. Maybe for some categories of apps like those targeted at kids who would need to convince a parent to approve the purchase, and in fact games tend to be free with IAP.
