WattSync – Free structured indoor training synced to bike computers

Summary: WattSync is a free web app that generates AI-based or imports Zwift workouts and syncs them directly to Garmin Edge or Wahoo ELEMNT devices. It enables automatic trainer resistance control via the head unit without requiring a phone or subscription.

What it does

WattSync creates structured workouts from user descriptions or Zwift .zwo files and syncs them to compatible bike computers. The head unit then manages smart trainer resistance automatically during the workout.

Who it's for

Cyclists with smart trainers and Garmin or Wahoo head units seeking subscription-free structured indoor training.

Why it matters

It eliminates monthly fees by leveraging existing equipment to deliver customizable, automated indoor workouts without additional devices.