# Column Subtraction vs MN Executive Function Scale

The clearest difference is price: MN Executive Function Scale at Free against Column Subtraction's $3.99. MN Executive Function Scale also leads on update cadence (every 2 months vs every 8 months) and iOS requirement (15.1 vs 17.6). Column Subtraction's advantage is rating (4.3 vs 3.0) and review sentiment (67% vs 50%). On ads, in-app purchases and device support there is nothing between them.

MN Executive Function Scale is free to download; Column Subtraction costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Column Subtraction holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 67% of Column Subtraction's written reviews are positive against 50% of MN Executive Function Scale's.

Column Subtraction ships an update every 8 months, MN Executive Function Scale every 2 months. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Column Subtraction | MN Executive Function Scale |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/column-subtraction/id341040894/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/mn-executive-function-scale/id967184252/reviews) |
| Number of ratings | **6** | 2 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 19 MB | 31 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [Reflection Sciences LLC](https://appshunter.io/developer/967184251) |

## What reviewers say

### Column Subtraction

[App page](https://appshunter.io/ios/app/column-subtraction/id341040894)

This educational app teaches and reinforces the column subtraction method. It offers an interactive interface with customizable settings for solving random or custom problems. The app includes a puzzle feature that unlocks as users solve math problems.

**Highlights:** Column subtraction method teaching, Interactive and customizable interface, Random and custom problem solving, Adjustable number of digits, Step-by-step renaming animation, Picture puzzle reward system

**Features:** macOS Compatibility

**In-app purchases:** none


### MN Executive Function Scale

[App page](https://appshunter.io/ios/app/mn-executive-function-scale/id967184252)

This app provides a brief, standardized assessment of executive function skills for ages 2 and up. Developed by neuroscience experts, it uses an engaging virtual card-sorting game to measure cognitive flexibility, working memory, and inhibitory control. Results are accessible via a secure web portal for tracking growth and early detection of difficulties.

**Highlights:** Standardized executive function assessment, Virtual card-sorting game, Adaptive to individual ability, Measures cognitive flexibility, working memory, inhibitory control, Secure web portal for score access and tracking, Early detection of EF difficulties, Formative assessment for educational programs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Column Subtraction free?

Column Subtraction costs $3.99, with no in-app purchases.

### Is MN Executive Function Scale free?

MN Executive Function Scale is free to download, with no in-app purchases.

### Which has better reviews, Column Subtraction or MN Executive Function Scale?

Column Subtraction is rated higher. Column Subtraction averages 4.3 out of 5 from 6 ratings, while MN Executive Function Scale averages 3.0 from 2 ratings.

### Do Column Subtraction or MN Executive Function Scale have ads?

Neither Column Subtraction nor MN Executive Function Scale shows ads.

### Which is updated more often, Column Subtraction or MN Executive Function Scale?

Column Subtraction ships an update every 8 months, and MN Executive Function Scale every 2 months. Most recently, Column Subtraction was updated on October 8, 2026 and MN Executive Function Scale on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*