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  • NetCage
    A per-app firewall for Android. Pick any installed app and cut its internet access, foreground and background, Wi-Fi and mobile, with one switch.
  • How it works
    NetCage routes only the apps you cage into a VpnService tunnel that goes nowhere, and discards their packets unread. The mechanism, and the invariant that keeps it safe.
  • Install and setup
    First launch, the VPN consent, the Finish setup card, Always-on VPN, battery, notifications, precise timing and optional Usage Access.
  • Caging apps
    The app list, search, filter chips, sort orders, bulk cage and release with undo, the detail view, per-app icons, hiding apps, and rules for apps that are no longer installed.
  • Profiles
    Group apps into a named set — work, travel, study — and cage the whole set in one action, either replacing your current selection or adding to it.
  • Schedules and day passes
    Recurring windows that cage a profile or a single app, day passes that let one app back online briefly, the global pause, and what happens at a boundary.
  • Widgets and the Quick Settings tile
    Control the cage without opening the app — a Quick Settings tile for the master switch, and a home-screen widget with per-app toggles for the apps you pin.
  • Account and sync
    Optional Google sign-in that keeps your rules, profiles, schedules, settings, hidden apps and custom icons the same on every phone — what syncs, what never does, and how to delete the account.
  • Settings and your data
    Backing up and restoring your NetCage setup, reading the event log, appearance options, and the settings that do not sync.
  • Privacy
    What the VPN can and cannot see, why a caged app's package name is never sent to any analytics or crash reporter, what NetCage's own connections carry, and the switches that turn them off.
  • Limitations
    What NetCage cannot do, and why — one VPN at a time, blocking by user ID, handoff to another app, cached content, DNS, transport rules, and the experimental root engine.
  • FAQ
    Common questions about NetCage — whether it is an ad blocker (it is not), performance, the "VPN has no internet access" notice, other VPNs, root, cached content and handoff.
  • Changelog
    What changed in each release of NetCage, latest first.
  • For agents
    A compact, machine-readable summary of NetCage for coding agents and LLMs — the canonical facts, the claims that are wrong, and where to find the raw Markdown.

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