# 비상교육 비상교재 vs 개념원리ai

The clearest difference is review sentiment: 개념원리ai at 95% against 비상교육 비상교재's 40%. 개념원리ai also leads on update cadence (fortnightly vs every 41 months). 비상교육 비상교재's advantage is iOS requirement (11.4 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

비상교육 비상교재 ships an update every 41 months, 개념원리ai fortnightly. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 비상교육 비상교재 | 개념원리ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 40.0% of reviews | **95.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 18 MB | 153 MB |
| Requires iOS | **11.4** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [VISANG EDUCATION INC](https://appshunter.io/developer/992780061) | [(주)개념원리](https://appshunter.io/developer/1589346598) |

## What reviewers say

### 비상교육 비상교재

[App page](https://appshunter.io/ios/app/id1481744652)

Access a wide range of educational materials and services for elementary, middle, and high school subjects. Discover textbooks, download related learning resources, and participate in events and promotions.

**Highlights:** Textbook and material information, Textbook preview, Personalized scrapbooking, Search history, Enhanced search functionality, Event participation, Notification service

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 비상교육 비상교재 free?

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

### Is 개념원리ai free?

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

### Do 비상교육 비상교재 or 개념원리ai have ads?

Neither 비상교육 비상교재 nor 개념원리ai shows ads.

### Which is updated more often, 비상교육 비상교재 or 개념원리ai?

비상교육 비상교재 ships an update every 41 months, and 개념원리ai fortnightly. Most recently, 비상교육 비상교재 was updated on September 10, 2026 and 개념원리ai on September 25, 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.*