HR & HRV Logger is an Android app developed by EPAS under the Lifestyle category with a subcategory of Health & Fitness. The app is designed to record and plot Heart Rate and Heart Rate Variability (HRV, R-R interval) using Polar H6, H7, H10, OH1, and TICKR Bluetooth transmitters. With the app, you can set thresholds with audible and visual alarms when exceeding or falling below user-defined thresholds, train in a specific zone, and indicate a possible irregularity of the heart. The app also allows you to export information about recordings to .csv files.

Overall, HR & HRV Logger is a user-friendly app that provides accurate and reliable heart rate and variability tracking. It is a great tool for athletes, fitness enthusiasts, and anyone who wants to keep track of their heart health.