- Here is one to work out Heart Rate Training Zones based on LTHR: https://web.archive.org/web/20140814130555/https://play.google.com/store/apps/details?id=com.app2droid.hrzc.base&hl=en
- Here’s James Driscoll’s pace calculator: http://www.dialsolutions.com/run/
- Then there are HRV apps like: ithlete, bioforce HRV and Elite HRV.