Privacy / Mobile security / 2026

TSOSX Shield

VPN, DNS shield and device security checks in one Android app.

Overview

What it is

TSOSX Shield protects traffic on Android: a sing-box VPN tunnel, a DNS shield that blocks ad and tracker domains on the device, and checks of installed apps, APK files and phone security settings.

Problem

Why it exists

A VPN alone does not tell you what your phone is leaking: which trackers your apps talk to, whether a downloaded APK is known-malicious, or which security settings are switched off. And most privacy apps ask you to trust a logbook you cannot see.

Solution

How it works

Shield combines the tunnel, the DNS filter and the scanner in one app, and keeps the sensitive parts on the device: the DNS log lives in memory, the installed-app list never leaves the phone, and an APK is checked by its SHA-256 fingerprint rather than by uploading the file.

Features

Core capabilities

  • sing-box / libbox VPN tunnel with subscription-based configuration
  • DNS shield: ad and tracker domains blocked on the device from public lists
  • APK check by SHA-256 fingerprint — the file itself is never uploaded
  • Risk review of installed apps, evaluated on the device
  • Device security settings audit
  • No account, no visited-site logs, no advertising identifiers

Stack

Technology

Kotlin Jetpack Compose sing-box / libbox DataStore Gradle convention plugins Android