Flowkeeper vs PomoTimer

Flowkeeper is a desktop Pomodoro timer and work-tracking tool built around the original Pomodoro Technique. It is available for Linux, macOS, and Windows; the Free plan costs nothing and has no subscriptions or paid features. Work organization includes task lists, daily backlogs, todo lists, reminders, and configurable categories. Fullscreen rest notifications are enabled by default, and users can set a notification to sound one minute before a Pomodoro ends. Keyboard shortcuts, timer and tray icon appearance, themes, and audio are configurable. Work summaries can be exported as Markdown, CSV, or JSON, and data can be exchanged as text. Data is stored locally in plaintext files that users can copy, back up, and edit. Flowkeeper works offline; users can share the data file manually or enable Watch changes, while online sync is under development. It can run external programs on application events. The maker says version 0.7.x only makes network calls to check for updates through the GitHub API, and those checks can be disabled in Settings. The FAQ identifies Constantine Kulak as author and says Flowkeeper is GPL-licensed.

PomoTimer has no write-up on Specifiction yet; its figures are above.