Your app may rely on third-party libraries for common use cases. However, third-party libraries can be a source of data leakage, especially those using external services, such as those for marketing and analytics.

Audit your third-party libraries to check that you are using the original code from its open source project. Also, check to see whether any libraries are unnecessary. Then remove any libraries you don’t need or where you cannot be sure of the source.

This step is important because third-party libraries can cause your app to be flagged as potentially harmful per the Malware or Mobile Unwanted Software policies.