Apple has added a new toggle to the top of the Subscriptis page the iPhe and iPad. By clicking the butt, the user can choose not to receive e-mail notificati each time a recurring In-App Purchase is charged.
It is a little more, but may be welcomed by Apple users that have a large number of subscriptis.
The default behavior is that Apple sends you a notificati each time the subscripti is at your expense.
For example, if you subscribe to the Apple of Arcade for $4.99 per mth, you will receive an e-mail of the receipt of the first time you sign up and another every mth. They serve as a reminder that you have been billed for this period.
The number of e-mails repetitive batteries rapidly that you accumulate active subscriptis, especially those that renew a mthly or weekly basis. If this becomes too annoying, you can now turn these off.