# DYB Window vs 루카(LUCA)

The clearest difference is review sentiment: DYB Window at 49% against 루카(LUCA)'s 32%. DYB Window also leads on update cadence (fortnightly vs every 6 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

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

DYB Window ships an update fortnightly, 루카(LUCA) every 6 weeks. Both last shipped on November 4, 2026.

## The numbers

| Metric | DYB Window | 루카(LUCA) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (20 ratings)](https://appshunter.io/ios/app/dyb-window/id6473522970/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | **49.2% of reviews** | 31.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 57 MB | 19 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Edu Brain Co. Ltd](https://appshunter.io/developer/1719087208) | [kiwon kim](https://appshunter.io/developer/1651576740) |

## What reviewers say

### DYB Window

[App page](https://appshunter.io/ios/app/dyb-window/id6473522970)

This app allows students to submit homework and tests, receive individual feedback, and track their learning progress. It builds a unique history of academic achievements for comprehensive performance management.

**Highlights:** Submit homework and tests, Receive individual feedback, Track learning progress, View class schedules, Check shuttle bus information, Manage retakes and supplementary lessons

**Features:** macOS Compatibility

**In-app purchases:** none


### 루카(LUCA)

[App page](https://appshunter.io/ios/app/luca/id6483211081)

Record wild animals found in your daily life and build biodiversity knowledge through expert identification results. This app serves as a platform for citizen science projects focused on the biodiversity of Gyeonggi Province.

**Highlights:** Record wild animals, Expert identification, Build biodiversity knowledge, Citizen science platform, Biodiversity exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is DYB Window free?

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

### Is 루카(LUCA) free?

루카(LUCA) is free to download, with no in-app purchases.

### Do DYB Window or 루카(LUCA) have ads?

Neither DYB Window nor 루카(LUCA) shows ads.

### Which is updated more often, DYB Window or 루카(LUCA)?

DYB Window ships an update fortnightly, and 루카(LUCA) every 6 weeks. Most recently, DYB Window was updated on November 4, 2026 and 루카(LUCA) on November 4, 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.*