iPhone In-App Purchases for Free-Trials
问题 I am in the process of releasing an application to the app-store. I recently saw that you can make your application free but have in-app purchases. When I saw this I thought that this could be used to create a free trial. However in Apple's Helpful Tips for Using In App Purchase In Free Apps it says Don’t set time limits on any of the functionality of your app, either for run times or life times. Applications that only run for a set number of minutes per session, or that expire altogether