# McRun

> Running pace calculator and training predictor based on best race times. (iPhone/iPad app by john abraham.)

- Source: https://appshunter.io/ios/app/mcrun/id539181544 (this page in markdown: same URL + `.md`)
- Developer: [john abraham](https://appshunter.io/developer/513269356)
- Category: Health & Fitness, Sports
- Price: $4.99 (on sale, was $9.99)
- Rating: 4.20/5 from 144 App Store ratings · 114 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.1 · 12 MB
- Languages: American English, Japanese
- Released: 2012-07-03
- Data updated: 2026-09-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/mcrun/id539181544/reviews.md

## What is McRun?

** Runner's World selected McRun "Must Have Running Apps - Top Tool"

McRun is the official app version of the well-known McMillan Running Calculator. Created by internationally recognized coach Greg McMillan, this calculator allows you to compute your running potential across different distances. You only need to input your best time from one distance and McRun does the rest. The app will tell you how fast you are capable of running from 100 yards to 100 miles. It also suggests optimal training paces based on both your fitness level and the type of runner you are.

McRun is a great way to target and train for peak performance.

Feedback? Suggestions? Sore legs?
Send us an email: peter@freestylestudios.com

Quick start guide:
 - From Calculator screen enter your best time in any distance and press “calculate”
 - View your equivalent race times
 - Press “Workout Paces” to see recommended paces for tempo runs, long runs, easy runs, and speed workouts
 - Select “Recalculate” to return to the Calculator screen
 - Turn your iPhone sideways to see motivational quotes and training tips

## Key features

- Calculate equivalent race times
- Suggest optimal training paces
- Target peak performance
- Motivational quotes and tips
- Supports distances from 100 yards to 100 miles

## What do users think of McRun?

Overall sentiment: mixed

**Pros**

- 👍 Easy to use interface
- 🎯 Accurate pace calculations
- ⚡ Quick workout pace suggestions
- 📊 Helpful race predictor tool
- 🏃 Great training aid for runners
- 💪 Useful for coaches and athletes
- 🔄 Convenient reference tool
- 📱 Portable access to calculations

**Cons**

- 🐛 Frequent app crashes on startup
- 💰 Expensive for limited functionality
- ❌ Less capable than free website version
- ⚠️ Lacks detailed workout descriptions
- 🚫 Missing key features from website
- 📉 Poor customer support responsiveness
- 🔧 Outdated and unmaintained
- ⛔ Incompatible with modern iOS versions

**Commonly reported bugs**

- App crashes immediately upon opening
- Crashes on iPhone 6, iPhone XS Max, iPhone 5s, iPad Pro
- Incompatible with iOS 8.3, iOS 9.1, iOS 10
- App closes itself within 3-6 seconds of launch
- Crashes after recent iOS updates
- Inconsistent pace calculations vs website version
- App won't stay open for extended use

**Most requested features**

- Display vLT and vVO2 data like website
- Add 600m distance to speed paces
- Include VO2 max calculation function
- Show pace for different race distances
- Add workout descriptions and explanations
- Customize distance options
- Provide km/mile pace conversions for treadmill
- Support goal-based training (not just race-based)
- Include training plan integration

## Recent user reviews (10 of 114)

All indexed reviews: https://appshunter.io/ios/app/mcrun/id539181544/reviews.md

### 5/5 — McHelpful

*2025-09-24*

I like McRun because it’s very easy to use, you just throw in some times and it quickly gives you a variety of workout paces.

### 5/5 — The best!

*2025-07-11*

I’ve been using the calculator for years to help set my training paces to help achieve my running goals.  Easy to use and accurate!

### 5/5 — Great Training Aid

*2021-08-07*

Really helpful in providing focus for training.  Recommended paces are just right.  Training for a marathon and this app is awesome.  Helped me BQ!

### 1/5 — Terrible

*2021-06-07*

Paid for the app but it won’t even open!

### 1/5 — Doesn’t even open

*2021-05-17, version 1.9*

Bought it and it doesn’t even open! I want a refund!

### 5/5 — For runners

*2021-04-09*

Great wee app for runners who like to geek out over speed

### 4/5 — I love this running app!

*2021-02-24*

I use this app while training, establishing running goals and when I use race comparisons during my training cycle.
This app is spot on, I’ve used it for 6 different PR’s and 5 BQ’s, it’s great!

### 2/5 — Glitching

*2021-02-21*

Just bought and downloaded this and the app keeps glitching immediately after opening, then shutting self down, which means I can’t even start calculating paces... maybe an upgrade is needed?

### 1/5 — Doesn’t work on iOS 14.4

*2021-02-05*

It can’t open on iOS 14.4. 5y without updating the software. I paid 11€ for this .....

### 1/5 — App crash

*2020-10-01*

Just purchased the app and it crashes upon opening. Please provide a refund. A $9.99 app and it won’t even open. This makes me hesitant of purchasing a training plan from their website. This app should not be in iTunes if it is no longer being updated or monitored by the developers or the Macmillan Staff.

## Frequently asked questions about McRun

### What does McRun do?

McRun is a running calculator that uses your best race time from one distance to predict your potential times across other distances. It also provides suggested training paces tailored to your fitness level and runner type, helping you train effectively for peak performance.

### How do I use McRun to calculate my paces?

To calculate your paces, simply enter your best time for any distance on the Calculator screen and press 'calculate'. You can then view your equivalent race times and press 'Workout Paces' to see recommended paces for tempo runs, long runs, easy runs, and speed workouts.

### Is McRun free to use?

Yes, McRun is a free application. It does not have any in-app purchases or advertisements, allowing you to access all its features without cost.

### What distances can McRun calculate paces for?

McRun can calculate your potential running times and suggest training paces for a wide range of distances, from as short as 100 yards up to 100 miles. This makes it a versatile tool for runners training for various events.

### What kind of training advice does McRun offer?

Beyond pace calculations, McRun offers motivational quotes and training tips. By turning your iPhone sideways, you can access these insights, which are designed to help you stay motivated and improve your training approach.

## Version history (last 5 releases)

### 1.9 — 2015-10-28

This update from Apple will improve the functionality of this app. No new features are included.

Improve race time display so all race times appear when using list of extended distances. Compile with latest SDK for stability.

### 1.8 — 2015-04-20

Updated for bug that was crashing app on load in iOS 8.2. Sorry about that! We replaced a 3rd party module that crashed the app on 8.2 release, all functionality should be the same.

### 1.7 — 2015-01-20

No release notes.

### 1.6 — 2013-02-12

Added support for iPhone 5 screen size, added paces for all workouts, revised some training values and addressed a couple visual bugs.

### 1.4.1 — 2012-09-26

Fixed problem with display on orientation change in iOS 6.

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All apps by john abraham: https://appshunter.io/developer/513269356

## Related topics

[john mcmillan](https://appshunter.io/ios/topics/john-mcmillan)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*