When you purchase an app on the App Store, it’s free to install onto every device that you own on the same platform.
For example, when you purchase the Premium upgrade in Teleprompter Premium on your iOS device, it’s free to use the Premium upgrade on all of your other iOS devices.
The iOS, Mac and Android versions of Teleprompter Premium are separate purchases.
You can view and re-download all of your purchased apps by doing to the
Today tab on the App Store, then tap your profile at the top, then tap
You will not be able to install your purchased apps onto devices that are owned by somebody else, your purchases are linked to your Apple ID. You will also not be able to install your purchased apps from another platform, such as a purchase on Google Play cannot be used on iOS.