Can not purchase PRO

Purchase does not proceed or a message such as "Cannot connect to iTunes Store" is displayed.

How to fix

  1. Check your network connection.
  2. Check your account on App Store.
  3. Check the date and time on your iPhone.
  4. Make sure that in-app purchases is permitted.
  5. Restart your iPhone

Please check Apple's support page: If you can't connect to the App Store, iTunes Store, or Apple Books

About PRO

PRO is a non-consumable purchases item.
If you have already purchased, you can restore purchase.

Your purchase information is not managed by developer like us.
For inquiries regarding purchase, please contact Apple Inc.
Apple Support: Request a refund for apps or content that you bought from Apple