CalcuRun
Plan your races with science
About
This app helps runners predict race times, plan training paces, and calculate race splits. It offers a science-based approach to training, with predictions based on recent performance. All calculations are done on-device for privacy.
What's New in CalcuRun
3.0
May 11, 2026
Welcome to CalcuRun 3.0 — the biggest update since launch. * All-new chronograph look with a dot-matrix display. * Your saved races and predictions now sync across devices via iCloud. * Redesigned iPad layout with a sidebar that puts the bigger screen to work. * New Display Font option in Settings if you'd rather use the system monospaced face. * More resilient progress chart and a smoother first-sync experience. * Tightened up race predictions and splits to handle edge cases more gracefully.
MoreIn-App Purchases
$0.99
1 Mile
A kind tip
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FAQ
How accurate are CalcuRun's race time predictions?
CalcuRun provides accurate predictions based on your recent race or time trial performance. The app uses scientific calculations to estimate your potential times across common race distances.
Can CalcuRun help me plan my workouts?
Yes, CalcuRun can provide workout paces based on your predicted race times. This allows you to tailor your training to achieve your race goals.
Does CalcuRun require an internet connection?
No, CalcuRun performs all calculations entirely on your device. It does not require an internet connection, ensuring your data remains private.
Is CalcuRun available on Android?
CalcuRun is currently available for iPhone and iPad. It supports iCloud sync across these Apple devices.
How often is CalcuRun updated?
The latest version, 3.0, was released on May 11, 2026. While specific update frequency isn't detailed, the app has seen significant redesigns, indicating active development.
What is the age rating for CalcuRun?
CalcuRun has an age rating of 4+, making it suitable for users of all ages. The app focuses on health and fitness calculations.
Does CalcuRun have ads?
No, CalcuRun is completely free with no ads. The developer prioritizes a clean user experience without advertisements.
How does CalcuRun handle user data privacy?
User data is highly private as all calculations are performed on the device. CalcuRun does not require an account or collect any personal information.
