What's New

minor changes

App Description

Heart Rate Variability Logger lets you record, plot and export time, frequency and non-linear HRV Features (includes experience sampling, RR-interval correction, DFA alpha 1 for aerobic threshold estimation in real-time, comparison between recordings, activity monitoring & step counting, location tracking).

Heart Rate Variability Logger requires a Bluetooth Low Energy (also called Bluetooth Smart or BLE or 4.0) heart rate sensor (we recommend Polar H7 or H10)

Main features:
- Extracts, plots, stores and exports heart rate, rr-intervals, time and frequency domain heart rate variability features (AVNN, SDNN, rMSSD, pNN50, LF, HF, LF/HF, alpha 1 from DFA)
- Configurable experience sampling for events annotation
- Comparison between up to 3 recordings lets you get a better understanding of differences in HRV under different contexts in a glance. The comparison modality includes also Outlier removal
- Activity tracking: step counter or accelerometer derived motion intensity for user context (step counter only for iPhones 5S)
- Location tracking, either using GSM/WiFi networks (low battery consumption) or GPS (high accuracy)
- Configurable time window for features computation (choose between 30 seconds, 1, 2 or 5 minutes)
- RR-intervals correction can be enabled to prevent ectopic beats or artifacts from affecting HRV features
- export for Kubios
- Filters data based on the selected threshold
- Shows HR in the app icon
- Data export using iTunes or Dropbox
- Tested for recordings longer than 24 hours

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

iPhone Screenshots

(click to enlarge)

Heart Rate Variability Logger screenshot 1 Heart Rate Variability Logger screenshot 2 Heart Rate Variability Logger screenshot 3 Heart Rate Variability Logger screenshot 4 Heart Rate Variability Logger screenshot 5

App Changes

  • August 15, 2013 Initial release
  • August 20, 2013 New version 1.2
  • August 30, 2013 New version 1.4
  • October 11, 2013 New version 1.6
  • October 18, 2013 New version 1.8
  • November 20, 2013 New version 2.0
  • November 20, 2013 Price increase: $3.99 -> $4.99
  • December 18, 2013 New version 3.0
  • December 28, 2013 Price increase: $4.99 -> $5.99
  • January 03, 2014 New version 3.2
  • January 07, 2014 Price decrease: $5.99 -> $4.99
  • January 09, 2014 New version 3.2.2
  • January 31, 2014 New version 3.4
  • January 31, 2014 Price increase: $4.99 -> $5.99
  • February 11, 2014 New version 4.0
  • February 13, 2014 New version 4.2
  • February 19, 2014 New version 4.2.2
  • March 07, 2014 Price decrease: $5.99 -> $4.99
  • May 15, 2014 New version 4.4
  • May 17, 2014 New version 4.4.2
  • May 22, 2014 New version 4.4.4
  • June 07, 2014 New version 4.4.6
  • September 05, 2014 New version 4.4.8
  • September 26, 2014 New version 4.5.0
  • February 03, 2015 New version 4.5.4
  • February 23, 2015 New version 4.5.5
  • April 22, 2015 Price increase: $4.99 -> $5.99
  • June 24, 2015 New version 4.5.6
  • September 19, 2015 New version 4.5.8
  • February 19, 2016 Price increase: $5.99 -> $7.99
  • July 27, 2016 Price decrease: $7.99 -> $3.99
  • November 05, 2016 New version 4.5.9
  • November 05, 2016 Price increase: $3.99 -> $7.99
  • December 13, 2016 New version 4.6.0
  • December 28, 2016 Price increase: $7.99 -> $8.99
  • June 13, 2019 New version 4.6.2
  • June 13, 2019 Price decrease: $8.99 -> $7.99
  • June 13, 2019 Price decrease: $8.99 -> $7.99
  • June 14, 2019 Price decrease: $8.99 -> $7.99
  • June 14, 2019 Price decrease: $8.99 -> $7.99
  • June 15, 2019 Price decrease: $8.99 -> $7.99
  • June 15, 2019 Price decrease: $8.99 -> $7.99
  • June 16, 2019 Price decrease: $8.99 -> $7.99
  • January 26, 2021 New version 4.6.8
  • January 26, 2021 Price increase: $7.99 -> $9.99
  • May 06, 2021 New version 5.0.6
  • August 05, 2021 New version 5.0.7
  • September 16, 2023 New version 5.1.1
  • November 15, 2023 New version 5.1.2

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