It depends on your business and app functionality. As we've written here [1], have a look at what Privacy Policies usually need to disclose:<p>- What kind of personal information you collect from users<p>- How do you use that personal information<p>- If you share this information with third parties<p>- If third parties can collect personal information through your app<p>- How can users access and change the personal information you collected<p>For example, if you're about to display ads through Google AdMob in your iOS app, then read AdMob Behavioral Policies [2]. At the "Personalized advertising" section, Google makes it clear that it may show interest-based ad to the users of your app and that any apps using AdMob must update their Privacy Policies to reflect this:<p>> Additionally, your app's privacy policy may need to be updated to reflect the use of personalized advertising (formerly known as interest-based advertising) served via the Google Mobile Ads SDK.<p>[1] <a href="https://www.quora.com/What-do-privacy-policies-typically-include/answer/Leah-Hamilton-10" rel="nofollow">https://www.quora.com/What-do-privacy-policies-typically-inc...</a><p>[2] <a href="https://support.google.com/admob/answer/2753860?hl=en&ref_topic=2745287" rel="nofollow">https://support.google.com/admob/answer/2753860?hl=en&ref_to...</a>