PaceRun

Plan smarter runs with an offline running calculator built for everyday training and race goals.
Calculate time, distance, or pace by entering any two values. Switch between kilometers and miles, predict race finish times with the Riegel formula, build target split tables, and estimate heart rate training zones from max heart rate or age.

Features:
- Pace calculator for time, distance, and pace
- Kilometer and mile support
- Race predictions for 5K, 10K, half marathon, and marathon
- Split calculator with optional negative splits
- Five heart rate training zones with bpm ranges
- Light, dark, and system theme options
- Works fully offline
- No special permissions required