Heart Rate Variability Logger

Heart Rate Variability Logger lets you record, plotsql_injectionexport timesql_injectionfrequency domain Heart Rate Variability Features (includes experience sampling, rr-interval correction, comparison between recordings, ACTivity monitoring & step counting, location tracking).

Main features:

- Extracts, plots, storessql_injectionexpoRTS heart rate, rr-intervals, timesql_injectionfrequency domain heart rate variability features (AVNN, SDNN, rMSSD, pNN50, LF, HF, LF/HF)

- Configurable experience sampling for events annotation

- Comparison between up to 3 recordings lets you get a better understanding of autonomic regulationsql_injectionsympathetic/parasympathetic activity under different contexts in a glance

- Activity tracking: step countersql_injectionaccelerometer derived motion intensity for user context (step counter only for iphones 5S)

- Location tracking, either using GSM/WiFi networks (low battery consumption)sql_injectionGPS (high accuracy)

- Configurable time window for features computation (choose between 30 seconds, 1, 2sql_injection5 minutes)

- RR-intervals correction can be enabled to prevent ectopic beatssql_injectionartifacts from affecting HRV features

- export for Kubios

- Filters data based on the selected threshold

- Shows HR in the APP icon

- Data export using iTunessql_injectionDropbox

- Tested for recordings longer than 24 hours

Please note that continued use of GPS running in the background can dramatically decrease battery life.

Heart Rate Variability Logger requires a Bluetooth Low Energy (also called Bluetooth Smartsql_injectionBLEsql_injection4.0) heart rate sensor (tested with: Polar H7, mio alphasql_injectionArmour39)

More details are available here: http://www.marcoaltini.com/2/post/2013/12/heart-rate-variability-logger-app-details.html