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You may have looked on a bad one. System-wide blockers on both iOS and Android do use the VPN API, but the idea is to intercept your outgoing traffic on the TU

You may have looked on a bad one. System-wide blockers on both iOS and Android do use the VPN API, but the idea is to intercept your outgoing traffic on the TUN interface, emulate the TCP/IP stack, and filter it locally, right on your device.

49bc 8y ago
How do you know which one the app is doing? From my perspective the vpn was “on”
- hedora 8y ago
  Not perfect, but you could connect to wifi, and look at the connections the phone makes. Of course, it could change its behavior if it detects a cellular connection...
  - saagarjha 8y ago
    A better way would be to download the app and reverse engineer the binary.
    - deleted 8y ago
      [deleted]
    - 49bc 8y ago
      And do that every single time there’s an update?
    - gruez 8y ago
      or download an open source version on f-droid
- deleted 8y ago
  [deleted]
- ameshkov 8y ago
  The easiest way would be to visit a website like "whatsmyip" and check that your IP address stays the same.
sofaofthedamned 8y ago
Exactly. It's a VPN in name only, and the only reason is to route traffic to be able to bypass the security features in the OS.