Advanced PortChecker vs Quad9 Connect
Side-by-side comparison of two open source alternatives
Advanced PortChecker
Advanced PortChecker is a utility to check if TCP ports are open or not. Features: Scan TCP ports Scans can be executed in the background Scans are executed in real-time Supports dark mode No ads, no spyware, no tracking
Quad9 Connect
Quad9 Connect is an Android and ChromeOS app that sends your DNS queries to Quad9's secure, private, open recursive DNS service. Quad9 Connect adds additional functionality and features compared to using Android's Private DNS feature to utilize encrypted DNS or configured Quad9 in Chrome on ChromeOS. The application creates a split VPN tunnel with Android API "VpnService" to configure an alternate DNS server on Android and ChromeOS. ## Features - DNS over TLS or DNS over UDP - DNS Query Log - Trusted Networks - Blocked Query Notifications - Local Domains - Excluded Applications
| Feature | Advanced PortChecker | Quad9 Connect |
|---|---|---|
| License | GPL-3.0-only | AGPL-3.0-or-later |
| Install sources | F-DroidGitHubIzzyOnDroid | F-DroidGitHub |
| Categories | Password ManagerProductivityBrowser | Password ManagerProductivityFirewallMessagingBrowser |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |