Adobe Reader mobile is a freeware application and downloading on an iOS device is free. Would you mind posting a screenshot where it's asking for payment details? Please remove any entered payment details before taking the screenshot.
Are you trying to unlock the premium features within the app like exporting a PDF file or converting other file types into a PDF file? As payment information is only required when the application is installed and you are trying to purchase Adobe Document Cloud features.
You may also refer to the articles for more details FAQ | Adobe Acrobat Reader mobile app
We're here to help, just need more info.
Thank you very much for your response.
I started by clicking "GET" in the first snapshot.
After type in my Apple password, I encountered the second snapshot.
I am downloading Reader for the first time to iPhone XS Max.
Thank you for sharing the screenshots , the payment information pop up is for your Apple ID and account, please complete the information process for your Apple account and then install Adobe Reader.
“Verification Required” message on iOS is a result of the payment method used on the Apple ID associated with the device. Accordingly, you will see that Verification Required billing message if the payment method failed, if there’s an unpaid balance on the account, or if the device has never purchased or downloaded anything or any free app before, or if the payment method has not been updated as needed.
Thus, to stop the Verification Required message, in iOS, you will need to change the payment method, either to a valid payment method or to ‘none’ which allows no payment details to be associated with an Apple ID and App Store.
As mentioned earlier, Adobe Reader Mobile and Desktop app is a freeware application and does not require any payment information to download.
Try the following steps to remove the message:
If you don’t want to add or verify a credit card with the Apple ID, or if the payment method expired, or you don’t want to use one at all, then you must change a setting on your Apple ID to stop the “Verification Required” message. Here’s how to do that:
Hope this helps and let us know if you experience any issue.