The purchase will be directly processed either by Google or by Apple, depending on whether you made this purchase on an Android or iOS device. So the purchase is made directly from Google or Apple. Please note that the terms and conditions of Google Play or the App Store also apply. For Android devices Google provides further information at https://support.google.com/googleplay/answer/2479637#apps, for iOS devices Apple provides further information at https://support.apple.com/HT204084.
Best regards from the Studo Team