The application lies within Lifestyle Tools, more precisely Healthcare & Fitness.
From the developer:
HRMReader is an application for reading data from Polar Heart Rate Monitors and displays the data in graphical or tabular form. It was inspired by the lack of Mac support from Polar for their devices.
The software also allows you to view your Heart Rate and Speed data as a graph, a table or as a bar graph, showing the distribution of your heart rate in various zones. A Summary of the data can also be displayed, showing laptimes, etc.
You may want to check out more software for Mac, such as PDF Reader Pro Free, Read One or Polar HRM to GPX Merger, which might be related to HRM Reader.