# 자등명 vs 밑줄

The clearest difference is in-app purchases: 자등명 at none against 밑줄's 2. 밑줄's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 밑줄 sells 2 in-app purchases, starting at $2.99 per month. 자등명 asks for nothing beyond the download.

자등명 ships an update every 11 days, 밑줄 every 9 days. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 자등명 | 밑줄 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 9 days** |
| Size | 1 MB | 53 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Seok Gyu Seo](https://appshunter.io/developer/1896778049) | [yosep lim](https://appshunter.io/developer/6792509203) |

## What reviewers say

### 자등명

[App page](https://appshunter.io/ios/app/self-lamp/id6778370127)

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

**In-app purchases:** none


### 밑줄

[App page](https://appshunter.io/ios/app/id6801996052)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 월간 이용권 | $2.99 | per month |
| 연간 이용권 | $29.99 | per year |


## Frequently asked questions

### Is 자등명 free?

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

### Is 밑줄 free?

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

### Do 자등명 or 밑줄 have ads?

Neither 자등명 nor 밑줄 shows ads.

### Which is updated more often, 자등명 or 밑줄?

자등명 ships an update every 11 days, and 밑줄 every 9 days. Most recently, 자등명 was updated on October 4, 2026 and 밑줄 on October 15, 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.*