App Store charges me again for an App I already purchased

Sometimes you purchase an app on your iPad and want to install it on your iPhone, or vice versa, and the App Store wants to charge you again.

Well, normally, when you purchase an app from the App Store, you are entitled to install it on up to 6 devices registered with the same Apple ID used during the purchase.

Apparently, when an app is initially only available for one platform and becomes available for other platforms, it takes Apple some time to sync purchases. We don't know how it works exactly because, as you may have understood, the developer only publishes the apps on the Store but Apple sells them. When you purchase one of our Apps, you pay Apple, not us, and Apple sends you the invoice.

We therefore recommend that you wait a few more days, and if the App still does not appear in the "purchased" list, try contacting Apple support from here:

https://support.apple.com/apps