Cost of apps up front before you add them?

When you download an app, it will either say “Get”, which means the app is free, or a price tag “$”. Note that there may be some in-app purchases that you can view by scrolling down on the app page.

If the app charges to download it, you will see that cost before you download. If the app has in-app purchases, you will see those along with the cost for each one before you download the app by looking at the details of the app in the App Store. It is under the In-App Purchases section of the app in the App Store.