Your phone scans your apps for malware. Ours never phones home.
Every other Android security app ships your data to a cloud server to "analyze" it. ContrastGuard doesn't.
It's a malware scanner that runs a real neural network entirely on your device — no telemetry, no uploads, no cloud calls, ever.
How it catches threats:
A PyTorch Mobile neural network trained on 120,000 labeled Android apps (60K malware, 60K clean) inspects 299 extracted features per APK
250+ hand-written rules cross-check the AI's verdict — dangerous permission combos, suspicious API calls, known-safe publisher whitelisting — to cut false positives
A consensus engine combines both signals into one verdict: Safe or Malware
What you get:
Scan any single APK before you install it
Batch-scan every app already on your phone
Real-time protection that watches new installs in the background and alerts you to threats
Full scan history, stored locally in Room — never uploaded anywhere
Built with Kotlin, Coroutines, Room, and Foreground Services, with PyTorch Mobile Lite doing the on-device inference. No backend. No external database. Your phone does the thinking.
Heads up: this is active development, not a certified security product, and it hasn't been independently audited. Feature extraction is still approximate rather than exact, which can trip false positives on large legitimate apps — that's the top item we're fixing next. Use it as one more layer, not your only one.
$9.99, one time, APK download included. Grab it below. 👇