GhostScreen (Ghost Screen) is an open-source, 100% offline Android privacy screen and screen-masking overlay app built with Kotlin & Jetpack Compose to stop shoulder-surfing.
android kotlin open-source offline-first android-security privacy-tools shoulder-surfing accessibility-service jetpack-compose privacy-screen screen-filter privacy-overlay screen-mask ghostscreen ghost-screen
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Updated
Oct 17, 2026 - Kotlin