Google is developing a system-level App Lock feature for Android 17, allowing Pixel users to secure individual applications with biometrics or a PIN. Recent Android Canary builds reveal a new API for integrating this feature into the default home screen launcher. This built-in App Lock aims to enhance user privacy by providing a straightforward way to protect sensitive apps without relying on third-party solutions. The implementation will allow users to long-press an app icon to lock it, with authentication options through Android’s BiometricPrompt. The feature is currently in early stages, with flags governing it still disabled. Android 17 is expected to be the earliest release for this feature. Unlike Android's Private Space, which isolates apps in a separate profile, the App Lock will allow easier access to frequently used applications. A system-level App Lock would offer stronger protection than third-party app lockers and align Pixel devices with OEM skins that already provide similar functionalities. Key questions remain regarding notification management and enterprise scenarios as the feature approaches release.