TimeRingFocus 0.4.1. for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Kazuhiro Kawana.
The unique ID for this application's bundle is jp.topoftree.TimeRingFocus. We recommend checking the downloaded files with any free antivirus. This free application is developed for Mac OS X 10.6 or later. The following versions: 0.4 and 0.3 are the most frequently downloaded ones by the program users. The application's installer is commonly called timeringfocus.dmg. The program lies within Productivity Tools, more precisely Timekeeping.
From the developer:
When using a Multi-Touch trackpad, after launching TimeRingFocus, click the digits to make them blink, then swipe up and down to adjust the time. You can also fine adjust using your keyboard's arrow-keys or directly type in digits with the numeric keys.
You may want to check out more Mac applications, such as iAlarm, Chronos or iCal Reply Checker, which might be related to TimeRingFocus.