# DDAYO vs 빅분기 필기

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

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

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

## The numbers

| Metric | DDAYO | 빅분기 필기 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 90 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


### 빅분기 필기

[App page](https://appshunter.io/ios/app/cbt/id6791423192)

Prepare for the Big Data Analyst certification exam with comprehensive study materials. This app offers concept lessons, a large question bank, detailed explanations, and smart review features to help you master the material and track your progress.

**Highlights:** Concept learning modules, 5,000+ practice questions, Detailed explanations and analysis, Smart review system (FSRS), Offline learning support, Progress tracking and statistics, Mock exams

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

**In-app purchases:** none


## Frequently asked questions

### Is DDAYO free?

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

### Is 빅분기 필기 free?

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

### Do DDAYO or 빅분기 필기 have ads?

빅분기 필기 shows ads; DDAYO does not.

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

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

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*