Apple established a policy for autoirenewables about 2 years ago that requires you to say (and not in just an alert but in a modal screen):
"Auto-renewable subscriptions are available from the App Store.\n • Payment will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration/price selected) unless auto-renew is turned off at least 24 hrs before the end of the current period.\n • Account will be charged for renewal within 24-hours prior to the end of the current period\n • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase.\n • Any unused portion of the free one month initial period will be forfeited when you purchase a subscription.\n\nPlease select one of the auto-renewable subscriptions below.";
And you also need a link to a website that contains your privacy policy and terms of use. (I think you need a link, not a statement within the app - but I am not certain.) That policy could be:
Privacy Policy
We do not collect any personal information from your use of our apps.
If we have any of your personal information
we will not knowingly sell or give it to anyone, except if lawfully subpoenaed
to produce it, and then only after offering you a reasonable chance
to challenge such subpoena if allowed by law.
Terms of Use
Standard terms of use apply to your use of all of our apps.
Further, you agree to indemnify us and hold us harmless from
any liability associated with your use of any of our apps and to
immediately stop using our apps upon any notice that
such use may be considered an infringing act. In no event will our
liability to you exceed the amount you have paid for our apps and any In App
Purchases made within our apps.
