CalcuRun
Joseph Iannazzone Health & Fitness iPhoneiPadiPod touch
CalcuRun is a free Health & Fitness app for iPhone and iPad by Joseph Iannazzone. Rated 5.0/5 from 6 ratings. Requires iOS 18.6. Updated May 11, 2026.
- Rating
- 5.0
- 6 ratings
- Price
- Free
- on the App Store
- Size
- 2 MB
- Age 4+
- Updated
- May 11
- 2026 · v3.0
Screenshots
About CalcuRun
Tired of juggling apps, websites, and bookmarks to plan your race training? CalcuRun is an all-in-one solution — completely free, with no ads and no accounts. Newly redesigned in version 3.0 with a chronograph-inspired look and a dot-matrix display, CalcuRun helps you predict race times, plan splits, and dial in your workout paces. Features * Input a recent race or time trial and get accurate predictions across common race distances. * Use the "Other" race distance for non-standard events. * View splits for each race, in kilometers or miles. * Get workout paces based on your predictions. * Use the Calculator to plan an individual race — input a time or pace and calculate the other. * Sync your saved races and predictions across your iPhone and iPad with iCloud. * Redesigned iPad layout with a sidebar that takes advantage of the bigger screen. * Choose between the new dot-matrix display font or the system monospaced face. * Learn more about how the calculations are performed. Most importantly, your data is private. Calculations run entirely on your device. CalcuRun does not require an account, internet access, or any device permissions. iCloud sync is fully encrypted, and your data is never sent to a CalcuRun server. If you choose to follow any in-app links, only the URL is passed to your default browser.
Ratings & reviews
5.0
6 ratings
What’s new
Version 3.0 · Updated 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.
App privacy
The developer, Joseph Iannazzone, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to CalcuRun
Looking for apps like CalcuRun? Here are 6 similar apps on the App Store. The highest rated is Runner's Tools (5.0/5), and all 6 are free to download.
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Runner's Tools
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Split Tracker - Timing System
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Simple Pace: Run Calculator
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Tempo: Run Log & Insights
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| CalcuRun | 5.0 / 5 (6 ratings) | Free | May 11, 2026 | |
| Runner's Tools | 5.0 / 5 (3) | Free | Mar 17, 2026 | Compare |
| Race Time Calculator | 5.0 / 5 (9) | Free | Oct 5, 2025 | Compare |
| Split Tracker - Timing System | – | Free | Oct 8, 2026 | Compare |
| Simple Pace: Run Calculator | 4.6 / 5 (39) | Free | Oct 15, 2026 | Compare |
| Pace: Running Pace Calculator | 4.7 / 5 (386) | Free | Oct 7, 2026 | Compare |
| Tempo: Run Log & Insights | 4.7 / 5 (1,034) | Free | Feb 16, 2025 | Compare |
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