# 정보처리기사 vs DDAYO

The clearest difference is in-app purchases: DDAYO at none against 정보처리기사's 2. DDAYO also leads on ads (none vs shown) and update cadence (daily vs every 3 months). 정보처리기사's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price there is nothing between them.

Both are free to download. 정보처리기사 sells 2 one-off in-app purchases. DDAYO asks for nothing beyond the download.

정보처리기사 ships an update every 3 months, DDAYO daily. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 정보처리기사 | DDAYO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 320 MB | 46 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jongmin Kim](https://appshunter.io/developer/1693759760) | [JinGyun Jeong](https://appshunter.io/developer/1535411435) |

## What reviewers say

### 정보처리기사

[App page](https://appshunter.io/ios/app/id6738232317)

Prepare for the Information Processing Engineer certification exam with this comprehensive app. It offers a vast collection of past exam questions, detailed explanations, and audio playback for on-the-go learning. Track your progress and review incorrect answers with dedicated features.

**Highlights:** 19 sets of latest past exam questions, Yearly and subject-specific question practice, Detailed explanations for all questions, Automatic incorrect answer saving, Favorite question bookmarking, Random question mode, Audio playback for questions, Lecture and study notes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고 제거 | $4.99 | one-time |
| 후원 하기 | $5.99 | one-time |


### DDAYO

[App page](https://appshunter.io/ios/app/ddayo/id6743990712)

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

**In-app purchases:** none


## Frequently asked questions

### Is 정보처리기사 free?

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

### Is DDAYO free?

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

### Do 정보처리기사 or DDAYO have ads?

정보처리기사 shows ads; DDAYO does not.

### Which is updated more often, 정보처리기사 or DDAYO?

정보처리기사 ships an update every 3 months, and DDAYO daily. Most recently, 정보처리기사 was updated on November 4, 2026 and DDAYO 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.*