HR & HRV Logger for Polar and TICKR heart monitor is an app developed to record and plot Heart Rate and Heart Rate Variability (HRV, R-R interval).
You can export information about recordings to .csv files,
The app was developed to use it in conjunction with Polar and TICKR bluetooth transmitter. It allows you to train with heart rate, you may set thresholds with audible and visual alarms when exceeding or below user-defined thresholds. The app can be used to train in a specific zone and it may be used to indicate a possible irregularity of the heart.