Stacking: Run Analytics

Your Apple Watch tracks every run. But are you actually getting better?

Stacking is your running companion for the long run. Understand your long-term progress, set goals that match how you train, and master the consistency that makes you a better runner.

Your Workouts, Visualized

• Trend Charts - Track your running progress over weeks, months, and years with clear visual comparisons
• Activity Grids - See your workout history at a glance with intuitive calendar views for the week, month, and year
• Heart Rate Zone Analysis - Understand the intensity of every workout with detailed 5-zone breakdowns using the proven Heart Rate Reserve method
• Explore detailed run data & charts - Filter your past workouts and view detailed data for your runs, which includes effort insights, heart rate data, pace, grade adjusted pace, splits and more.

Set Goals That Stick

Create personalized fitness goals that match how you actually train:

• Frequency - "Run 3 times a week"
• Duration - "Exercise for 150 minutes a week"
• Distance - "Cycle 100 km a month"
• Elevation - "Gain 5,000 m this year"

Track progress for any activity: running, cycling, swimming, strength training, yoga, HIIT, and more. Set weekly, monthly, or yearly targets and watch your progress build.

Insights That Matter

• Compare this week to last week, this month to last month, this year to last year
• Filter by activity type to focus on what matters to you
• Track total time, distance, and elevation gained across all your workouts
• Track Resting Heart Rate, HRV, VO2 Max, Active Energy, and Cardio Recovery with clear 3-year trends from Apple Health

Upgrade to Stacking Pro

• Monitor your heart rate zones over time
• Compare your easy pace week-to-week improvements
• View your Yearly Activity progress
• and more!

Built for Your Preferences

• Customize heart rate zones to match your training
• Choose your units: kilometers or miles, meters or feet
• Set your week to start on Monday or Sunday

Privacy First

Stacking reads directly from Apple Health. Your data stays on your device where it belongs.

Stack your runs. Track your trends. See your progress.

For terms of service: https://stackingapp.net/terms