Focuser is a free, open-source blocker for websites and applications, built in Rust and offered under the MIT License. It can block domains, keywords, wildcards, URL paths or all internet access, though some pattern rules depend on its browser extension. Applications can be blocked by executable name, full path or window title. Focus options include Pomodoro sessions that switch blocking between work and break periods, daily time allowances, and weekly schedules. Lists can be locked for a chosen duration so they cannot be changed or disabled before the timer ends. The project includes 1,207 domains in 13 ready-to-import categories. Browser extensions are listed for Chrome, Firefox, Edge, Brave and Opera. Block lists and statistics are stored in a local SQLite file; the project says it has no cloud sync, accounts, analytics or telemetry. The extension checks tab URLs locally rather than sending or logging them. Focuser is listed for Linux, macOS and Windows, with no mobile apps.
Who it is for
Focuser suits people who want scheduled website or app blocking on Linux, macOS or Windows. Its local storage and absence of cloud sync may also suit users who prefer to keep block lists and statistics on-device.
What is good
- Blocks websites and applications.
- Pomodoro sessions switch blocks between work and breaks.
- Lists can be locked for a chosen duration.
- Stores lists and statistics in a local SQLite file.
- Free and open-source under the MIT License.
What to know first
- Some pattern rules require the browser extension.
- No cloud sync is listed.
- No mobile apps are listed.
Verdict
Focuser offers scheduled and locked blocking across desktop systems, with local storage for lists and statistics. It may fit people who want those controls without mobile apps or cloud sync.
Focuser plans and pricing
All plansCompared on distraction blocking software
- Free plan
- Yes
- Block targets
- websites and apps
- Scheduled blocking
- Yes
- Recurring schedules
- Yes
- Locked sessions
- Yes
- Browser extensions
- Yes
- Mobile apps
- none



