FlagTimes 0.2.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Productivity Tools, more precisely Timekeeping. We recommend checking the downloaded files with any free antivirus. The actual developer of this free software for Mac is Piérre Reimertz.
From the developer:
FlagTimes is a macOS timezone app for anyone working in multiple timezones. The utility is based on Apple's own clock. So if you trust your computer's time, you can trust FlagTimes. The tool comes with some settings, such as am/pm time and auto-start on login.
You may want to check out more software for Mac, such as Tea Timer, Missing Sync for Sony PSP or BigBen, which might be similar to FlagTimes.