Comparison

Runner's Tools vs CalcuRun

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Runner's Tools

This app helps runners plan and analyze their training and races. It offers features like race predictors, training pace calculators, and split planners. It also accounts for environmental factors and converts between metric and imperial units.

Highlights
  • Race Predictor
  • Training Pace Calculator
  • Track Split Conversion
  • Race Split Planning
  • Environmental Factor Analysis
  • Pace Conversion
  • Age Graded Performance Calculation
Features
Read full description

Features: - Race Predictor: Will predict your potential on the most common race distances based on a given one. The automatic calculation uses a dynamic scale but we also made it possible to use your own (single Riegel factor) value. The default gives a realistic prediction, not assuming everyone is a trained high mileage athlete! - Training paces: Based on a (planned or recent) race performance, will calculate both the appropriate splits and paces for interval and tempo training - Track splits: Using GPS for track training is not great. This tool will convert a given pace to the target split of a full lap for each lane of a standard (IAAF) 400m track - Race Splits: Plan any race by breaking the distance and target race time down by kilometer or mile markers - Evaluate or plan a race by factoring in elevation, elevation gain/loss, temperature and humidity (dew point) - Convert any pace from minutes per mile to minutes per km and vice versa - Calculate the right speeds to set treadmills to, based on pace - Calculate age graded performance Works in both metric and imperial system.

About

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.

Highlights
  • 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
Features
Read 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.

Screenshots

Runner's Tools4 screens
CalcuRun4 screens

Verdict

The call

The clearest difference is update cadence: CalcuRun at every 4 weeks against Runner's Tools's every 38 months. On price, rating, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Runner's Tools sells 1 one-off in-app purchase and CalcuRun sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Runner's Tools against 5.0 for CalcuRun. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

UpkeepUpdate frequency

Runner's Tools ships an update every 38 months, CalcuRun every 4 weeks. The most recent releases landed on September 3, 2026 and September 9, 2026 respectively.

Scorecard1 real difference · 9 level
Runner's Tools versus CalcuRun: the parameters behind the verdict, then further details
ParameterRunner's ToolsCalcuRun
PriceFreeFree
Rating5.0 (3 ratings)5.0 (6 ratings)
Positive reviews100.0% of reviews—
Number of ratings36 — better
Update frequencyEvery 38 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.6
Further details — not scored
Size2 MB2 MB
Age rating4+4+
DeveloperFrederic BacroJoseph Iannazzone

Customer experience

Runner's Tools

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CalcuRun

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Runner's Tools

One-time1
  • No Ads$0.99
5 purchases

CalcuRun

One-time5
  • 1 Mile$0.99
  • 5K$1.99
  • Turkey Trot$3.99
Show 2 more
  • Half Marathon$5.99
  • Marathon$9.99

Questions

Is Runner's Tools free?
Runner's Tools is free to download, with in-app purchases available.
Is CalcuRun free?
CalcuRun is free to download, with in-app purchases available.
Which has better reviews, Runner's Tools or CalcuRun?
Runner's Tools and CalcuRun are both rated 5.0 out of 5 on the App Store, from 3 and 6 ratings respectively.
Do Runner's Tools or CalcuRun have ads?
Neither Runner's Tools nor CalcuRun shows ads.
Which is updated more often, Runner's Tools or CalcuRun?
Runner's Tools ships an update every 38 months, and CalcuRun every 4 weeks. Most recently, Runner's Tools was updated on September 3, 2026 and CalcuRun on September 9, 2026.

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