Training Today vs CalcuRun
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Training Today
This app analyzes your Apple Watch health data to provide a daily readiness to train score. It helps prevent overtraining injuries and guides your training intensity, offering insights into your body's recovery and performance potential.
- Calculates daily readiness to train (RTT) score
- Multi-day RTT score chart
- Independent Apple Watch app
- Uses HRV, workout detection, and custom algorithm
- Automatic data outlier filtering
- iPhone companion app with tutorial
- Complication support for quick RTT glance
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Take Readiness to Results. Understand your readiness. Choose training that fits today. Follow your progress over time. Training Today brings readiness and training together for triathletes, runners, cyclists and swimmers. Your Readiness to Train (RTT) score uses HRV readings from Apple Health and your personal baseline to help you decide when to push, keep steady or take it easy. FROM READINESS TO YOUR NEXT SESSION With Premium, explore structured swim, bike and run workouts that adapt to your RTT. Review the session, choose your options and send supported workouts to Apple Watch. Review readiness-based changes on iPhone before updating a workout on your Watch. BUILD YOUR TRAINING WEEK Shape Your Week around your training preferences. Choose sessions, move workouts and review suggestions as your week unfolds. Schedule strength and conditioning alongside your endurance training. CONNECT YOUR TRAINING Share readiness and health metrics with TrainingPeaks, with optional daily sync. Upload completed workouts separately from Workout Analytics after granting workout-upload access. Send supported cycling workouts to ROUVY. Choose power targets when configured, or free ride with heart-rate cues. Connected accounts and the relevant permissions are required. SEE THE BIGGER PICTURE Review recorded activities, readiness and HRV history. Use sleep context, Activity Intensity Score and Overall Fitness Index (OFI) trends to better understand your training. OFI is a personal HRV-based trend indicator, not a direct measurement of performance or VO2 max. START FREE. EXPLORE PREMIUM. Start with your readiness score, recent readiness chart, current sleep and resting heart rate, and recent OFI trends. Premium adds workout planning and the library, recorded activity review, deeper history, customization and integrations. Monthly, annual and lifetime purchase options unlock Premium; available options and local prices appear in the app. Training Today needs suitable Apple Health data to calculate readiness. Wear a compatible Apple Watch regularly, including overnight, and allow access to the health data you want to use. Watch workouts and other features depend on compatible devices and software. Your score supports training decisions: consider it alongside how you feel. Training Today does not provide medical advice, diagnosis or treatment. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy: https://trainingtodayapp.com/privacy
CalcuRun
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.
- Predict race times based on recent performance
- Plan workout paces
- Calculate race splits
- Support for custom race distances
- iCloud sync across devices
- On-device calculations for privacy
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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.
Screenshots
Verdict
The clearest difference is rating: CalcuRun at 5.0 against Training Today's 4.6. CalcuRun also leads on monetization model (free vs freemium). Training Today's advantage is ratings volume (2.6K vs 6) and iOS requirement (16.0 vs 18.6). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Training Today sells 4 in-app purchases, starting at $2.95 per month and CalcuRun sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
CalcuRun holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Training Today has 2.6K ratings behind it against 6, so its average is the more settled of the two.
Training Today ships an update every 6 weeks, CalcuRun every 4 weeks. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.
| Parameter | Training Today | CalcuRun |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.6K ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 52.5% of reviews | — |
| Number of ratings | 2.6K — better | 6 |
| Update frequency | Every 6 weeks | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free — better |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 48 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Betoli Ltd | Joseph Iannazzone |
Customer experience
Training Today
CalcuRun
Bugs and requests
Training Today
Reported bugs
4 issues- Crashes on launch after purchasing subscription
- Widgets not working after recent updates
- Discrepancies between data shown on iPhone and Apple Watch
- Inability to get HRV readings without using the Breathe app
Requested features
6 requests- Extend the number of days shown on the chart
- Add more data points like sleep and oxygen levels
- Provide more detailed explanations of the metrics and how they are calculated
- Improve the Apple Watch complication to update more frequently
- Integrate with other fitness platforms like Garmin and Polar
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- Add training plans that adapt to HRV data
CalcuRun
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Training Today
- Monthly subscription$2.951 Month
- Yearly subscription$29.991 Year
- Additional charts$5.99
- Lifetime$59.99
CalcuRun
- 1 Mile$0.99
- 5K$1.99
- Turkey Trot$3.99
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- Half Marathon$5.99
- Marathon$9.99









