macOS
Lock In!
Block the websites and apps that break your concentration — everywhere, not just in one browser.
Start a focus session from your menu bar and the timer counts down right there. Blocking happens at the network level through a macOS system extension, so opening a different browser does not get you around it.
Works in every browser at once
Most blockers are a Chrome extension you can disable in two clicks. Lock In blocks at the network level, so one session covers Safari, Chrome, Firefox, Arc, Brave — and any browser you install tomorrow.
321 sites, already sorted
Ready-made blocklists for Social, Video, News, Shopping and Adult content. Toggle whole categories per session, or add your own domains.
Strict mode
Locks the session so you cannot stop it early. For the times you do not trust yourself.
Pomodoro breaks
Automatic work and break intervals, with lengths you choose. When a session ends, an alarm rings until you dismiss it.
Live timer in the menu bar
See the countdown at a glance without opening anything. Sessions survive quitting the app or rebooting.
Private by design
Everything runs locally on your Mac. No account, no analytics, no telemetry — and your browsing is never logged or sent anywhere.
Pay once
No subscription. No account. Buy it once and it stays yours.
Requirements
macOS 14.0 (Sonoma) or later. Website blocking uses a macOS system extension, which you approve once during setup. Blocking is best-effort: it is effective for ordinary browsing but cannot guarantee that a determined user will not circumvent it — see the terms for detail.