# Column Subtraction vs StudyAgent

The clearest difference is price: StudyAgent at Free against Column Subtraction's $3.99. StudyAgent also leads on rating (5.0 vs 4.3) and review sentiment (100% vs 67%). Column Subtraction's advantage is in-app purchases (none vs 2). On ratings volume, ads, device support and iOS requirement there is nothing between them.

StudyAgent is free to download; Column Subtraction costs $3.99 up front. StudyAgent sells 2 in-app purchases, starting at $9.99 per month. Column Subtraction asks for nothing beyond the download.

StudyAgent holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 13 respectively. Written reviews point the same way: 67% of Column Subtraction's written reviews are positive against 100% of StudyAgent's.

Column Subtraction ships an update every 8 months, StudyAgent every 10 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Column Subtraction | StudyAgent |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/column-subtraction/id341040894/reviews) | **[5.0 (13 ratings)](https://appshunter.io/ios/app/studyagent-ai-homework-tutor/id6754365864/reviews)** |
| Number of ratings | 6 | **13** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 10 days** |
| Monetization | Paid | **Freemium** |
| Size | 19 MB | 83 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [Oli&Oli Limited Inc](https://appshunter.io/developer/1848056408) |

## 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


### StudyAgent

[App page](https://appshunter.io/ios/app/studyagent-ai-homework-tutor/id6754365864)

This AI-powered learning system provides instant homework grading with step-by-step explanations. It offers personalized tutoring, interactive video lessons, and knowledge trees to help users master concepts across various subjects. Practice is tailored to individual weaknesses, fostering deep understanding.

**Highlights:** Instant homework grading with step-by-step explanations, Personalized AI tutor via text or voice, Interactive video learning with AI chat, Visual knowledge trees for concept connection, Targeted practice based on identified weaknesses, Progress tracking across subjects, Privacy-focused learning environment

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StudyMates Premium | $9.99 | per month |
| StudyMates Ultra | $19.99 | per month |


## Frequently asked questions

### Is Column Subtraction free?

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

### Is StudyAgent free?

StudyAgent is free to download, with in-app purchases available.

### Which has better reviews, Column Subtraction or StudyAgent?

StudyAgent is rated higher. Column Subtraction averages 4.3 out of 5 from 6 ratings, while StudyAgent averages 5.0 from 13 ratings.

### Do Column Subtraction or StudyAgent have ads?

Neither Column Subtraction nor StudyAgent shows ads.

### Which is updated more often, Column Subtraction or StudyAgent?

Column Subtraction ships an update every 8 months, and StudyAgent every 10 days. Most recently, Column Subtraction was updated on November 1, 2026 and StudyAgent on October 30, 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.*