Name: Heart rate chart (data field)
Rating: 4.6 (21 reviews)
Author: babysimon_uk

A data field showing your heart rate as a chart. The chart starts by showing 7.5 minutes, then doubles and doubles again to show 30 minutes. As soon as Garmin make it possible to configure data fields, the maximum length will become configurable!

Forum thread: https://forums.garmin.com/showthread.php?239718
(If you are tempted to leave negative feedback please come post in the forum thread, I can't help you here!)

Other chart data fields

Speed: https://apps.garmin.com/en-US/apps/14bf2d0b-7f08-40bb-b315-3ff33ce2b734
Pace: https://apps.garmin.com/en-GB/apps/869a88b7-37b0-4c34-b8b7-c9bfd01d47d1
Cadence: https://apps.garmin.com/en-US/apps/815881f2-dc56-4f11-a5cd-117f11b80bcf
Power: https://apps.garmin.com/en-US/apps/bb752d7d-759f-4646-893a-52ec7d6fb7af
Elevation: https://apps.garmin.com/en-US/apps/0bbabaa9-aedf-44e8-913b-60e4198be083

Changelog
1.3.1 - Reduce memory use in an attempt not to crash on newer ConnectIQ versions
1.3 - Variable durations, flip pace chart to match Garmin Connect
1.2 - Increase durations, increase font size for long thin layouts, try to clip spikes in pace/speed
1.1 - Rework smaller layouts for better legibility
1.0 - Initial version