# Solve vs 개념원리ai

The clearest difference is ads: 개념원리ai at none against Solve's shown. 개념원리ai also leads on monetization model (free vs ad-supported) and review sentiment (95% vs 86%). Solve's advantage is update cadence (every 4 days vs fortnightly). On price, in-app purchases and device support there is nothing between them.

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

Solve ships an update every 4 days, 개념원리ai fortnightly. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Solve | 개념원리ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 85.7% of reviews | **95.1% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Ad-supported | **Free** |
| Size | 154 MB | 153 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Testbank Inc.](https://appshunter.io/developer/1489897656) | [(주)개념원리](https://appshunter.io/developer/1589346598) |

## What reviewers say

### Solve

[App page](https://appshunter.io/ios/app/solve-study-notes/id1629592780)

This app offers free past exam papers for various subjects and allows users to access popular workbooks digitally. It features automatic grading and integrated note-taking for efficient studying, eliminating the need to flip between books and answer keys.

**Highlights:** Free past exam papers, Digital workbooks, Automatic grading, Integrated note-taking, Problem and solution on one screen, iPad and Apple Pencil support

**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 Solve free?

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

### Is 개념원리ai free?

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

### Do Solve or 개념원리ai have ads?

Solve shows ads; 개념원리ai does not.

### Which is updated more often, Solve or 개념원리ai?

Solve ships an update every 4 days, and 개념원리ai fortnightly. Most recently, Solve was updated on September 22, 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.*