Contact witkompapp@gmail.com with your app version, device and operating system, and a description of the problem. Do not email passwords, payment details or purchase tokens.
The iOS and Android editions offer an optional one-time purchase that removes banner ads. The store displays the price in your local currency before purchase. There is no subscription.
Use Restore Purchases in the app while signed in to the same store account that made the purchase. An internet connection is needed to check the purchase. Purchases are separate between Apple's App Store and Google Play.
Use the advertising privacy options in the app when available to review or change your choices. iOS tracking permission can also be managed in system settings. File transfers do not require consent to personalized advertising.