# DDAYO vs 정처기 필기

The clearest difference is in-app purchases: DDAYO at none against 정처기 필기's 3. DDAYO also leads on ads (none vs shown) and update cadence (daily vs every 3 days). 정처기 필기's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price there is nothing between them.

Both are free to download. 정처기 필기 sells 3 in-app purchases, starting at $1.99 per month. DDAYO asks for nothing beyond the download.

DDAYO ships an update daily, 정처기 필기 every 3 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DDAYO | 정처기 필기 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 days |
| Size | 46 MB | 97 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JinGyun Jeong](https://appshunter.io/developer/1535411435) | [dasong sim](https://appshunter.io/developer/1883683802) |

## What reviewers say

### DDAYO

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

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

**In-app purchases:** none


### 정처기 필기

[App page](https://appshunter.io/ios/app/id6761716439)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 정처기 프리미엄 월간 | $1.99 | per month |
| 정처기 프리미엄 3개월 패스 | $3.99 | per 3 months |
| 정처기 프리미엄 평생 이용권 | $5.99 | one-time |


## Frequently asked questions

### Is DDAYO free?

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

### Is 정처기 필기 free?

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

### Do DDAYO or 정처기 필기 have ads?

정처기 필기 shows ads; DDAYO does not.

### Which is updated more often, DDAYO or 정처기 필기?

DDAYO ships an update daily, and 정처기 필기 every 3 days. Most recently, DDAYO was updated on October 30, 2026 and 정처기 필기 on October 31, 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.*