KillSwitch icon
KillSwitch icon

KillSwitch

A zero-configuration, un-bypassable macOS focus engine that enforces 1-click monk mode using kernel-level packet filtering.

Verified Apple Developer ID signature and Gatekeeper Notarization check confirming a clean, malware-free native binary.

Cost / License

  • Pay once
  • Proprietary

Platforms

  • Mac
Standby Mode: Minimalist, zero-configuration interface to lock in 1, 2, 4, or 8 hours of distraction-free focus with one click.
Active Lockdown: Kernel-level packet filter enforces monk mode while strictly whitelisting Localhost, Docker, and Tailscale.
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The Walk of Shame: Psychological emergency unlock requiring manual typing of an exact confession to abort early without shortcuts.
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Features

Properties

  1.  Minimalistic

Features

  1.  Website blocking
  2.  Block Distraction

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KillSwitch was added to AlternativeTo by Phuc Hoang Duy on and this page was last updated .

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What is KillSwitch?

KillSwitch is an opinionated, native macOS digital discipline tool built in Rust and Tauri v2. It is engineered for software engineers, writers, and deep-work professionals who need absolute focus without loopholes or tedious setup.

Unlike traditional blockers that require managing complex blacklists and schedules, KillSwitch eliminates configuration theater entirely: you select your session duration, click "Lock In", and your Mac instantly becomes an execution-only workstation.

Key Characteristics & Architecture:

  • Zero-Configuration Monk Mode: No tedious blocklists or settings to fiddle with. One click enforces strict digital isolation without pause buttons or bypass loopholes.
  • Kernel-Level Enforcement: Instead of browser extensions or /etc/hosts hacks that can be disabled in seconds, it injects strict drop-rules directly into an in-memory macOS Packet Filter (pfctl) anchor, dropping public DoH, raw DNS, and commercial VPN tunnels.
  • Developer-Friendly Intranet: Explicitly preserves engineering workflows by whitelisting Localhost, Docker subnets, SSH, and Tailscale connections, ensuring terminal work is never disrupted while distractions are blocked.
  • Tamper-Resistant Clock Engine: Operates detached from user-configurable system clocks; tracks hardware CPU ticks via mach_continuous_time synced with trusted NTP headers to eliminate time-travel exploits.
  • The Walk of Shame: For emergencies, the only way to abort a session early is to manually type a 150-word, grammatically rigorous confession without typographical errors (copy-pasting, drag-and-drop, and window-switching are strictly blocked).
  • Apple Notarized & Local-First: Verified clean by Apple's automated notary service; runs 100% on-device with zero SSL decryption or cloud browsing telemetry.

KillSwitch Focus is offered under a perpetual fallback license ($49 USD one-time purchase) including 1 year of updates and OS compatibility patches, with zero recurring subscriptions.