BlockAds

BlockAds is a free, open-source ad blocker for Android.

It blocks ads, trackers, and malware system-wide using local VPN-based DNS filtering — no root required, no data collection.

Built with Jetpack Compose and Material 3 for a modern, premium experience.

Features

- System-wide ad blocking via DNS filtering — no root needed - Multiple built-in filter lists (StevenBlack, AdGuard DNS, EasyList, and more) - Region-aware defaults — auto-enables filters for your language - Real-time DNS query logs with search & filtering - Security protection — blocks phishing, malware, and malvertising domains - Dark / Light / System theme with Material 3 dynamic colors - 7 accent color options + Material You dynamic theming - Quick Settings tile & home screen widget - Custom block/allow rules and whitelisting - Per-app filtering (bypass VPN for selected apps) - DNS-over-HTTPS (DoH) support with multiple providers - Auto-update filter lists on schedule (6h / 12h / 24h / 48h) - Export / Import settings backup - Auto-reconnect on boot - Multi-language support (English, Vietnamese, Japanese, Korean, Chinese, Thai, Spanish) - 100% local — all data stays on your device

How It Works

BlockAds creates a local VPN on your device. DNS queries are routed through it and matched against filter lists using a memory-efficient Trie data structure. Matching queries are blocked locally. All other traffic passes through normally — no data leaves your device.

Credits

- Developed and maintained by Nguyen Quang Minh - Built with Jetpack Compose, Koin, and Compose Destinations

License

GNU General Public License v3.0