# 질문일기 vs Cosmos

The clearest difference is in-app purchases: Cosmos at none against 질문일기's 1. Cosmos also leads on update cadence (every 10 days vs every 3 months). 질문일기's advantage is iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 질문일기 sells 1 one-off in-app purchase. Cosmos asks for nothing beyond the download.

질문일기 ships an update every 3 months, Cosmos every 10 days. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 질문일기 | Cosmos |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 65 MB | 30 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [KyongDon Um](https://appshunter.io/developer/1556429574) | [YoungSeo Yun](https://appshunter.io/developer/1827154411) |

## What reviewers say

### 질문일기

[App page](https://appshunter.io/ios/app/5/id6448211821)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 프리미엄 구매 | $0.99 | one-time |


### Cosmos

[App page](https://appshunter.io/ios/app/cosmos/id6749366368)

**In-app purchases:** none


## Frequently asked questions

### Is 질문일기 free?

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

### Is Cosmos free?

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

### Do 질문일기 or Cosmos have ads?

Neither 질문일기 nor Cosmos shows ads.

### Which is updated more often, 질문일기 or Cosmos?

질문일기 ships an update every 3 months, and Cosmos every 10 days. Most recently, 질문일기 was updated on October 9, 2026 and Cosmos on September 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.*