It took Apple a while, but finally, in-app purchases are allowed to be used in free apps. Why is this exciting? Well, previously, only apps that had a price were allowed to include an in-app purchase model. That means that games like Tap Tap Revenge 3 has to cost at least $.99 if the developer wanted to sell you add-on packs. This is also the reason that you see so many demo, or “Lite” versions of apps in the App Store. Now, you can download a demo version of an app, and upgrade to the full version while playing the free version. We’d love to see apps like Shoot It! get on board with this as well, as we think the freemium model is the sweet spot in the App Store.