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KoncentroDeep Dive
Free

Free and open source under GPL-3.0-or-later.

 Free

Free and open source under the GPL-3.0-or-later licence, with optional donations.

Windows, macOS, Linux Linux
  • Combines timed work sessions and task lists
  • Supports separate workspace settings
  • Pomodoro timer and free-running stopwatch in one app
  • OS-level website blocking during focus sessions
  • Website blocking uses a local proxy server
  • Assumes no other proxy server is in use
  • Designed for GNOME on Linux only
  • Blocking is tied to the app rather than browser-specific rules
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-3.0-or-later
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.