# 달공부 vs LUMEN

The clearest difference is ads: LUMEN at none against 달공부's shown. 달공부's advantage is iOS requirement (13.2 vs 17.6). On price, update cadence, in-app purchases and device support there is nothing between them.

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

달공부 ships an update fortnightly, LUMEN every 9 days. The most recent releases landed on October 1, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 달공부 | LUMEN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 23 MB | 28 MB |
| Requires iOS | **13.2** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SuWon Choi](https://appshunter.io/developer/1452191072) | [Jaewhan Namkoong](https://appshunter.io/developer/1872906976) |

## What reviewers say

### 달공부

[App page](https://appshunter.io/ios/app/plus/id6443337098)

This app helps you manage your monthly study goals and track your study time using a built-in timer. Create custom study routines with preparation, study, and break periods. Automatically record your study sessions in a digital diary and receive notifications when routines are complete.

**Highlights:** Monthly study time goal setting, Customizable study routine timer, Automatic study session recording, Digital study diary, Time utilization tracking, Notifications for routine completion

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

**In-app purchases:** none


### LUMEN

[App page](https://appshunter.io/ios/app/lumen/id6758431652)

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

**In-app purchases:** none


## Frequently asked questions

### Is 달공부 free?

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

### Is LUMEN free?

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

### Do 달공부 or LUMEN have ads?

달공부 shows ads; LUMEN does not.

### Which is updated more often, 달공부 or LUMEN?

달공부 ships an update fortnightly, and LUMEN every 9 days. Most recently, 달공부 was updated on October 1, 2026 and LUMEN on September 18, 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.*