A nice (free) app on the Garmin IQ store/ Works on the 920XT and other new models.
Based on a quick morning reading with an aid to guide your breathing.
Still more work to be done but a great start and potentially one of the most useful Garmin IQ Apps.
Get your firmware on your device up to date then you can download <here>.
Last Updated on 13 January 2026 by the5krunner
tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors.
Hi, great app. Which algorithm do you use to calculate HRV? rmssd?
hi
it’s not my app sorry !! however, yes it will use RMSSD.
Do I need to enable HRV before I use this Garmin IQ app. I saw it on your other post here https://the5krunner.com/2014/12/11/garmin-920xt-turn-on-hrv/
I’m not familiar with the app. If it uses and/or requires HRV then you will need to enable HRV for sure. there’s not significant downside for enabling it anyway. also enable per second NOT SMART recording…just in case.