It connects to Garmin via OAuth and automatically syncs your activities to show: - Cardiac drift trends over time - HR zone distribution (are you actually running easy enough?) - MAF pace progression - Resting HR and wellness trends - Goal tracking (weekly distance, easy % targets, race goals)
The motivation was my own training — I couldn't find a tool that specifically tracked aerobic development over months the way I wanted to see it. Strava shows you what you did; this shows you whether your base is actually improving.
It's free to use. Would love feedback, especially from anyone deep into MAF or polarised training.