Focusan - 集中

About

Focusan is a website blocker for Chrome that helps you cut distractions and protect your attention. Inspired by Bushidō — calm on the surface, resolute underneath. No telemetry, no
  remote sync of usage data, no ads.

  WHAT IT DOES
  
  • Block any site at the network layer. Uses Chrome's declarativeNetRequest API, so blocked sites never load — fast and reliable, including SPAs like YouTube.
  • Schedule blocking by time. Work hours, weekdays, weekends, custom day/time rules, overnight ranges — set it once and forget it.
  • Daily limits per site. Cap visits or minutes per day. Focusan stays out of your way until you cross the line, then steps in.
  • Pomodoro focus sessions. Run timed blocks in blocklist or whitelist mode, with a calm timer and a clear bell at the end.
  • Temporary allowances. When you genuinely need a site, grant yourself a short, time-boxed exception — instead of fighting the blocker.
  • Local statistics, streaks, and achievements. Quiet motivation. No leaderboards, no comparisons.
  • Two themes: Kuro (dark) and Shiro (light). English and Russian interface.

  WHY USE IT

  • Privacy first. Everything stays in your browser. Focusan does not send your URLs or usage data anywhere. No analytics. No third-party services.
  • Cleaner than willpower. Blocking happens at the network level, so distractions don't even render — there is nothing to click away.
  • Works the way you work. Schedules, limits, and Pomodoro sessions compose freely. You can block YouTube every workday morning, allow it during lunch, and cap it at 30 minutes
  total.