Overrun#

An iOS app for trimming and managing HealthKit workouts. Built for the common problem of forgetting to stop recording — leaving you with an 8-hour "run" that wrecks your stats.

Features#

Workout List#

• Workouts grouped by month/year with section headers
• Search by activity type name (case-insensitive)
• Sort by date (default), longest duration, or shortest duration — useful for quickly finding forgot-to-stop workouts or accidental recordings
• Paginated loading (50 at a time) with infinite scroll
• Pull-to-refresh

Workout Detail & Trimming#

• Activity graph showing heart rate, active energy, or distance over time (auto-selects the best available metric)
• Range slider to visually select the portion of the workout to keep
• Dimmed overlay on the graph showing which portions will be trimmed
• Live-updating start time, end time, and duration display
• Activity type picker with 20 supported workout types
• Delete workout with confirmation

Data Warning#

Trimming a workout is destructive and irreversible.

HealthKit does not allow modifying a workout's start/end dates in place. When you trim a workout, Overrun deletes the original workout and creates a new one with the trimmed time range. This means:

• Heart rate, energy, and distance samples become orphaned — they remain in HealthKit but are no longer associated with any workout. The new trimmed workout has no linked samples.
• Workout routes (GPS/location data) are permanently lost.
• Workout events are permanently lost.
• Device association is lost.
• Only metadata (custom name, notes, etc.) is preserved.

The app shows a confirmation dialog before saving. Make sure you want to proceed.

Requirements#

• iOS 17+
• Xcode 15+
• HealthKit entitlement

Building#

Open WorkoutEditor.xcodeproj in Xcode and run on a device or simulator. The app requires HealthKit authorization to read and write workouts and associated samples.

In debug builds, 200 sample workouts are auto-generated on first launch for testing.