Pace It is a running analytics app for iOS and Apple Watch that tracks pace at specific heart rate zones over months to show whether training is actually producing faster times. It syncs with Strava and Garmin to build longitudinal fitness trends, including Training Load Ratio and personalized pace targets, without replacing the user's existing tracking workflow.
Funding
Funding not disclosed
Founders
Product
Problem
Most running apps show what happened on a single run—pace, distance, heart rate, and splits—but none connect that data across months to answer whether the same effort is producing faster pace over time. Runners training with intent lack a clear signal of whether their aerobic fitness is actually improving, making it difficult to adjust training effectively or avoid overtraining.
Solution
Pace It provides a longitudinal analytics layer that tracks pace in each heart rate zone month over month, surfacing trends like Zone 2 pace improvements at the same heart rate. It calculates Training Load Ratio (acute-to-chronic workload) to flag when runners are building too fast or tapering, and derives personalized training paces from the last 60 days of data. The app syncs with Strava and Garmin, so users keep their existing workflow while gaining a second lens on the same data. All analytics are computed on-device, with activity data passing through the server only to deliver it to the phone when integrations are connected.
Target Audience
Primary users are runners who train with intent—those who know what heart rate zones are, care about whether their easy pace is improving, and want longitudinal data to show whether their training is working. It is designed for runners who already use Strava or Garmin and want a companion analytics layer rather than a replacement.
Features
- Pace-at-Effort Trends: tracks pace in each heart rate zone month by month to show aerobic improvement at the same effort
- Training Load Ratio: acute-to-chronic workload indicator that flags overreaching or tapering across running, cycling, and other activities
- Running Efficiency scatter: plots every run from the last 90 days by pace vs. heart rate, with dots drifting left indicating improved fitness
- Adaptive Pace Targets: personalized training paces derived from the last 60 days of running data, updating as fitness changes
- Pro-grade Apple Watch app: 40+ metrics across 5 customizable screens, structured interval execution with pace and HR targets, plus haptic zone alerts
- Training Distribution: effort split across easy vs. hard intensity, time in each HR zone, and aerobic vs. anaerobic load focus
- Pace It Index: a single 0 to 100 fitness score that reacts to real changes in training
- Strava and Garmin integration: syncs history without writing back, preserving the user's existing tracking setup