CalcuRun vs Watchletic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
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.
Watchletic
This app provides structured interval workouts directly to your Apple Watch, helping serious runners stay focused on their training. It syncs with popular training platforms and offers advanced pacing tools with audio and haptic alerts to keep you on track.
- Direct training plan integration
- Workouts on Apple Watch
- Audio and haptic alerts
- Advanced pacing tools
- Apple Health sync
- Export to Strava, GPX, TCX, FIT
Read full descriptionHide full description
Turn your Apple Watch into a connected training companion for running and cycling. Follow structured workouts, connect compatible Bluetooth sensors directly to your watch, and keep the data you need visible during every session. Pair heart-rate monitors, Stryd foot pods, compatible treadmills, cycling power meters and FTMS smart trainers. Available data depends on the device and may include heart rate, pace, distance, power, cadence, speed and battery level. Sync structured workouts from TrainingPeaks, Final Surge, Nolio, Intervals.icu, Trenara, V.O2, StrideOn, Athletica, TrainAsONE and more. Your workouts sync with Apple Health and can be exported as GPX, TCX or FIT files. FEATURES — Structured intervals, warm-ups, cooldowns, recovery sessions and long runs — Direct Bluetooth support for compatible running and cycling sensors — Audio and haptic alerts for splits and targets — Advanced pacing with split options, grade-adjusted pace and Stryd power — Live tracking through a private link for selected friends — Share structured workouts by link or QR code — Export to Strava or as GPX, TCX and FIT files — Always-On display support during workouts — Simple setup with useful defaults WATCHLETIC CLUB Watchletic Club is an optional subscription that adds analytics, training-load insights, estimated thresholds, duration curves, readiness and fitness trends. Built with the community: feature requests are always welcome and often make their way into the app. Terms of Use: https://apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: CalcuRun at 5.0 against Watchletic's 4.3. CalcuRun also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Watchletic's advantage is update cadence (every 2 weeks vs every 4 weeks) and ratings volume (29 vs 6). On price, in-app purchases and device support 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. CalcuRun sells 5 one-off in-app purchases and Watchletic sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
CalcuRun holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 29 respectively.
CalcuRun ships an update every 4 weeks, Watchletic every 2 weeks. The most recent releases landed on October 18, 2026 and October 21, 2026 respectively.
| Parameter | CalcuRun | Watchletic |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | 4.3 (29 ratings) |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | 6 | 29 — better |
| Update frequency | Every 4 weeks | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 2 MB | 128 MB |
| Age rating | 4+ | 4+ |
| Developer | Joseph Iannazzone | Hesselbom Tech AB |
Customer experience
CalcuRun
Watchletic
In-app purchases
CalcuRun
- 1 Mile$0.99
- 5K$1.99
- Turkey Trot$3.99
Show 2 moreShow fewer
- Half Marathon$5.99
- Marathon$9.99
Watchletic
- Monthly7 Days trial$3.991 Month
- Yearly1 Month trial$39.991 Year









