Google will implement changes to app functionality on Android devices starting next month, affecting over half of all Android users. The changes are driven by the Play Integrity API, which aims to reduce fraud and data theft, resulting in an 80% reduction in unauthorized app usage. Devices running Android 13 and above will experience improved performance, while those on Android 12 or older may face slower performance. Google is also introducing enhanced security signals for developers to assess device trustworthiness. Over half of Android devices have not upgraded to Android 13 or later, and approximately 200 million users remain on Android 12, which no longer receives security patches. Users on Android 12 or 12L are advised to upgrade for better security and performance.