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.
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User Rating
3.14 out of 5
7 ratings
in United Kingdom
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Ratings History
Reviews
Export doesn’t work
Worked great until I tried to export my data and none of the 3 options work. Contacted the developer on Twitter but no response. If you are looking to use the app to record your heart rate data for other analysis software then do not purchase until this is fixed.
Disappointing
I bought this to try and use it for the DFA-alpha1 testing of aerobic threshold but have also adopted using it for morning HRV logging. The morning logging is going well but the logging during runs has a fundamental flaw. Twice I have set out with everything running as required, but my phone in my waist belt so not visible to me. On return from the run I find the logger app is sat waiting for me to select the BT HR monitor, as though a drop out occurred at some point. Consequently most of the test run is wasted. My other running app, iSmoothRun, handles this fine since it has a setting to tell it which sensor to use at all times. This logger should do the same, whilst recording, if it has a drop out it should try and pick up the same sensor. Without this I cannot rate the app higher. It was not a cheap app.
Game Changer??
Have been using this app over the past week to assess the reliability of using the DFA (alpha 1) metric to locate the Aerobic Threshold (aka ... VT1, LT1) for my athletes at Tri-High Performance. I have only been using a basic Bluetooth chest strap rather than the polar strap that HRV4TRAINING recommend to see if could be rolled out at minimal cost. When used indoors on a bike trainer or treadmill, I have found that a DFA (alpha 1) reading of 0.75, has consistently coincided with around 85% of Lactate Threshold Heart Rate (as determined by the final 20 minute HR of a 30 minute TT). This would certainly correlate very well with established AeT heart rate estimates. To support this, intensities that produce readings above 0.75 have always felt very ‘conversational’ , and intensities that produce values below 0.75 have always felt less than ‘conversational’. I this metric will prove to be a reliable resource to endurance athletes everywhere. I have had issues using it outdoors over variable terrain, but in a controlled environment - it has so far provided me with what appears to be an extremely useful assessment of heart rate at the aerobic threshold.
HRV Logger
I don’t know how good this is , as there are no instructions on how to set up , or what the results mean.
Reliable HRV and HR logging
This app is so practical and elaborate that I cannot recommend it enough. It works flawlessly with my Zephyr HxM Smart chest strap.
I am using this app to track my HRV and HR for general monitoring in the morning, exercise, and to track effect of medication which affects my heart.
During the day I need to write notes about my condition and the app allows me to add ‘events’, i.e. notes during measurements. That is one great feature.
I also like that the app gives you access to full statistics, there is no silly subscription fee. If you are serious about your health and want to learn about your heart, this is a good learning source.
One advice: If you use Zephyr device and you have instability problems, you need to soak your sensing strap (but not the circuit unit!) in lukewarm water. It might work for other chest straps as well. I would only recommend the author to change the colour scheme - this blue and green combination seem old fashioned.
Simple and clear
This app is simple, no clutter and gives you the possibility to record you HR/HRV, High and Low frequencies for as short or as long as needed. I use it for me and patients to understand things that affects our stress response and inflammation.
Doesn't work.
Tried with several BLE4.0 chest straps. Doesn't recognise any of them. Zero functionality. Most frustratingly doesn't see my Wahoo Blue HR, which works flawlessly with every other app I've tried most notably regularly with Endomondo. Most disappointing, Buyer Beware !
Good idea but I can't get it to work
Great idea but I can't even connect to my Polar H7 HRM... Not good!