# 풀다 vs 개념원리ai

The clearest difference is in-app purchases: 개념원리ai at none against 풀다's 23. 개념원리ai also leads on iOS requirement (13.0 vs 15.0). 풀다's advantage is rating (4.6 vs 4.2) and update cadence (every 4 days vs fortnightly). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. 풀다 sells 23 in-app purchases, starting at $19.99 per month. 개념원리ai asks for nothing beyond the download.

풀다 holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 16 and 5 respectively. Written reviews complicate that: 90% of 풀다's written reviews are positive against 95% of 개념원리ai's, so the app with the better star average is not the one people write more warmly about.

풀다 ships an update every 4 days, 개념원리ai fortnightly. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 풀다 | 개념원리ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (16 ratings)](https://appshunter.io/ios/app/ai/id1530892838/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews) |
| Number of ratings | **16** | 5 |
| Positive reviews | 90.2% of reviews | **95.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 347 MB | 153 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FilledU Inc.](https://appshunter.io/developer/1530779207) | [(주)개념원리](https://appshunter.io/developer/1589346598) |

## What reviewers say

### 풀다

[App page](https://appshunter.io/ios/app/ai/id1530892838)

Prepare for middle and high school exams, mock tests, and college entrance exams with AI-powered problem recommendations. Track your progress, identify weaknesses, and manage your studies effectively.

**Highlights:** Middle/High school exam preparation, Mock test and college entrance exam questions (2015-2023), AI-recommended practice problems, Customizable problem selection by type and difficulty, Learning progress analysis and weakness identification, Study planner with to-do list and timer, Automatic incorrect answer management

**Features:** macOS Compatibility

**In-app purchases (23)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 풀다 패스 월 구독 | $19.99 | per month |
| AI 실전 모의고사 1회 풀이권 | $0.99 | one-time |
| 질문권 10개 | $0.99 | one-time |
| 질문권 50개 | $6.99 | one-time |
| 불꽃 모드 1회 이용권 | $7.99 | one-time |
| 질문권 100개 | $14.99 | one-time |
| 베이직 30일 이용권 | $19.99 | one-time |
| 풀다 패스 90일 이용권 | $39.99 | one-time |
| 스탠다드 30일 이용권 | $44.99 | one-time |
| 베이직 90일 이용권 | $59.99 | one-time |
| 풀다 패스 180일 이용권 | $89.99 | one-time |
| 스탠다드 90일 이용권 | $99.99 | one-time |
| 플러스 90일 이용권 | $119.99 | one-time |
| 스탠다드 180일 이용권 | $129.99 | one-time |
| 풀다 패스 360일 이용권 | $149.99 | one-time |
| 플러스 90일 이용권 | $199.99 | one-time |
| 스탠다드 180일 이용권 | $199.99 | one-time |
| 플러스 180일 이용권 | $199.99 | one-time |
| 스탠다드 360일 이용권 | $229.99 | one-time |
| 스탠다드 360일 이용권 | $299.99 | one-time |
| 플러스 180일 이용권 | $399.99 | one-time |
| 플러스 360일 이용권 | $399.99 | one-time |
| 플러스 360일 이용권 | $799.99 | one-time |


### 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 풀다 free?

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

### Is 개념원리ai free?

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

### Which has better reviews, 풀다 or 개념원리ai?

풀다 is rated higher. 풀다 averages 4.6 out of 5 from 16 ratings, while 개념원리ai averages 4.2 from 5 ratings.

### Do 풀다 or 개념원리ai have ads?

Neither 풀다 nor 개념원리ai shows ads.

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

풀다 ships an update every 4 days, and 개념원리ai fortnightly. Most recently, 풀다 was updated on September 21, 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.*