Blokada isn't a serious security app. It leaks DNS connections over TCP (only handles UDP) and uses covert techniques to track users (generates a unique ID for every install and sends it tagged with the phone model every time one visits a blokada webpage from within the app).

Yeah, no where close.

Disclaimer: I work on privacy enhancing tech on Android.

As a user of Blokada myself I'd like to ask, is there any system-wide ad blocker for Android you would recommend?

Apart from usual suspects like AdGuard [0] and other anti-virus products:

Intra [1] with any adblocking DNS of your choice.

Nebulo: [2] A no-gimmicks alternative to DNS based blocking (their latest beta supports DNS over HTTP3 (QUIC)).

I use both: Intra has no DNS leaks but is IPv4 only right now and laced with analytics (the fork I developed/use is stripped off all analytics). Nebulo is lighter on RAM and battery and supports custom on-device blocklists (non PlayStore version).

[0] https://adguard.com/en/adguard-android/overview.html

[1] https://getintra.org/

[2] https://git.frostnerd.com/PublicAndroidApps/smokescreen#inst...