Every time I try to download an app out the App Store the AppStore is charging me. Why?
I try to download a bank app call found and it charged me 2 times.
i had to call my bank and cancel it. Why is this happening
Is this an app that you have to pay for once, or does it include special features, which need an In-App purchase?
Buy additional app features with in-app purchases and subscriptions - Apple Support
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In the App Store, if an app has a Get button instead of a price, the app is free. You won't be charged for downloading a free app. Some free apps offer in-app purchases and subscriptions that you can buy. Subscriptions and in-app purchases give you access to additional features, content, and more.
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copied from: Download apps on your iPhone or iPad - Apple Support