If you make use of the Runtastic app for tracking your runs or other activities, the Runtastic Heart Rate Monitor is a good add-on. It works via Bluetooth (dongle-free) and there’s not much setup required, since it connects automatically once you open the app (sometimes ours struggled, but we would place the blame on the phone rather than on the monitor).
Heart Rate zone monitoring can be an effective way to help increase your anaerobic threshold, cardiovascular capacity or fat burning rate, and voice feedback provided from the app tells you in which zone you are currently in. Afterwards Runtastic provides a chart that tracks your heart rate to your pace/speed/elevation, and shows the percentages of each heart rate zone of your workout. R1 200 from Dion Wired or Totalsports.