Question
I have my first application dedicated to Chiropractor's in the iOS App Store and it's a free download with a monthly investment for half the functionality. I want to offer a trial to show the value, is that possible?
Answer
You can add a license component to the app that checks your server for validity when it launches (there are actually services that do this for you if you don't know how to). This way you can offer trials of varying lengths and leave the in-app stuff to for purchasing. I've done this set up with my previous company and it worked exceptionally well.