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Developed an Android content management application for CFC that allows administrators to publish, edit, hide and delete news, photos and videos directly from a smartphone. The app is connected to Supabase for authentication, database and storage, with updates synchronized to the public website.
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Tamper-Proof Content Blocker & Device Protection App
System-Level Mobile Threat Protection & Local Network Filtering
The Challenge
Standard Android content filters are easy for users to bypass, disable, or uninstall, while third-party remote VPNs introduce severe latency and data privacy risks.
The Solution & Impact
Built a Kotlin-native Android application that enforces device-level content filtering and anti-tampering protection locally without sending user traffic to external servers.
Local VPN & DNS Filtering: Intercepts system-wide DNS packets via a local VpnService TUN interface to block prohibited domains locally with zero latency.
System-Level Security Hooks: Utilized Android Accessibility Services and Device Admin APIs to prevent unauthorized uninstallation, force-stopping, or setting bypasses.
Tamper-Proof Lock: Enforced settings locking via an encrypted, randomized password generator to ensure non-bypassable enforcement.
Tech Stack: Kotlin | Android SDK | VpnService | Accessibility APIs | DeviceAdminReceiver | Jetpack Compose
Keeping Device Admin scope minimal is the right call, Google's been rejecting anti-uninstall apps that request broad policies. Curious if you're watching the slow deprecation path there, since newer restriction APIs don't have a clean replacement yet for this exact use case.