Setsudo (節度) is a Mac-only application created to help you focus on what is meaningful. A translucent bar with a line of text appears randomly near the center of your screen. You can edit the text, hide the bar, or wait some seconds for it to disappear.
The only advanced feature, a timer, can be enabled in the menu bar. The time spent since the timer was enabled (or the app opened) is then displayed before the text message. You can reset it by using the menu bar (or re-opening the app).
Setsudo (節度) is free, and should be considered alpha quality. It is heavily inspired by the defunct original version of Focusbar.