Mini Stopwatch 1.5 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. We recommend checking the downloaded files with any free antivirus. This free Mac application is a product of ClemStation.
From the developer:
The most minimalist menubar stopwatch for macOS
You may want to check out more Mac applications, such as Mini Writer, Mr Stopwatch or Stopwatch Deluxe, which might be similar to Mini Stopwatch.
Timekeeping
Timekeeping