Fuse – Merge & Trim Workouts

Fuse helps you take control of your Apple Health workouts.

If a workout gets split mid-session, Fuse lets you merge multiple recordings into one complete activity. If a session includes extra time you don't want, trim it down and save a cleaner version back to Apple Health.

Lost GPS signal mid-workout? Draw the missing part of your route on the map and Fuse rebuilds it, distance included. Saved a session as the wrong activity type? Change it in a couple of taps — your route, heart rate, and metrics stay intact.

Before making any changes, you can review full workout details — including route data, heart rate, duration, distance, energy, laps, and segments.

With Fuse, you can:

• Merge multiple Apple Health workouts into a single activity
• Trim a workout to keep only the section you want
• Fix GPS gaps by drawing the missing route directly on the map
• Change a workout's activity type (for example, Indoor Walk to Outdoor Walk)
• Preview workouts and see gaps before confirming a merge
• Choose whether to keep or remove originals after merging
• Upload workouts directly to Strava or Intervals.icu
• Export workouts as FIT or GPX files
• Browse and filter your workout history by activity type
• View full workout details with maps, heart rate charts, and key metrics

Fuse is built for athletes who want cleaner records, better exports, and full control over their training data — without unnecessary complexity.

Whether you're fixing auto-split sessions, repairing GPS gaps, cleaning up imported workouts, or preparing files for other platforms, Fuse makes your Apple Health workout history easier to manage.