I Heart GPX

* Did your running app crash half-way and lose your heart rate?
* Do you just like using the Apple Watch activity app, but still want to get heart rate info onto Strava or Runkeeper?
* In short--do you have heart rate information in Health that you want to see on your run?

I Heart GPX will take a GPX file and check your heart rate data in Health to see if you can attach any of it to that GPX. Then it'll let you save a new copy of that file with the data included.

It should preserve the GPX features below in the exported file; if there's something missing from your export, feel free to send me an example of the input file and I should be able to make a fix.

GPX features:

* Cadence
* Ambient temperature
* Elevation
* Heart rate

iOS Health Integration: This app uses HealthKit to retrieve your heart rate information.