# 개념원리ai vs CEO 36

The clearest difference is iOS requirement: 개념원리ai at 13.0 against CEO 36's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

개념원리ai ships an update fortnightly, CEO 36 every 2 weeks. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 개념원리ai | CEO 36 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 95.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 153 MB | 127 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [(주)개념원리](https://appshunter.io/developer/1589346598) | [taeseong song](https://appshunter.io/developer/1885128551) |

## What reviewers say

### 개념원리ai

[App page](https://appshunter.io/ios/app/ai/id6467370741)

This app combines a popular math textbook with AI to offer personalized learning. It provides free assessments with detailed explanations, allows users to create custom problem notes, and features a ranking system for friendly competition. Prepare for exams with AI-predicted questions and access a vast problem bank for all middle and high school levels.

**Highlights:** Personalized assessments with free detailed explanations, Customizable problem notes for focused review, AI-predicted exam questions based on school and curriculum, Extensive problem bank for all grades, Interactive ranking system and missions for motivation, Study groups and Q&A for collaborative learning

**In-app purchases:** none


### CEO 36

[App page](https://appshunter.io/ios/app/ceo-36/id6802898210)

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

**In-app purchases:** none


## Frequently asked questions

### Is 개념원리ai free?

개념원리ai is free to download, with no in-app purchases.

### Is CEO 36 free?

CEO 36 is free to download, with no in-app purchases.

### Do 개념원리ai or CEO 36 have ads?

Neither 개념원리ai nor CEO 36 shows ads.

### Which is updated more often, 개념원리ai or CEO 36?

개념원리ai ships an update fortnightly, and CEO 36 every 2 weeks. Most recently, 개념원리ai was updated on October 15, 2026 and CEO 36 on October 4, 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.*