# YBM리더스 vs 단어장 비비디(Vividy)

The clearest difference is update cadence: 단어장 비비디(Vividy) at weekly against YBM리더스's every 2 months. YBM리더스's advantage is iOS requirement (9.0 vs 13.0). On price, ads, 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.

YBM리더스 ships an update every 2 months, 단어장 비비디(Vividy) weekly. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | YBM리더스 | 단어장 비비디(Vividy) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 55 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YBM NET, Inc.](https://appshunter.io/developer/332188969) | [Yechan Joo](https://appshunter.io/developer/1891250176) |

## What reviewers say

### YBM리더스

[App page](https://appshunter.io/ios/app/ybm/id1336514362)

**In-app purchases:** none


### 단어장 비비디(Vividy)

[App page](https://appshunter.io/ios/app/vividy/id6761746672)

This app helps you create and manage vocabulary lists through a 5-stage learning system. It utilizes a spaced repetition algorithm to schedule reviews, ensuring words are revisited before they are forgotten. Focus on studying only the words you need to learn, maximizing efficiency and retention.

**Highlights:** 5-stage word management system, Spaced repetition review scheduling, Automatic selection of words for study, Adaptive learning based on test results, Efficient vocabulary memorization

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

**In-app purchases:** none


## Frequently asked questions

### Is YBM리더스 free?

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

### Is 단어장 비비디(Vividy) free?

단어장 비비디(Vividy) is free to download, with no in-app purchases.

### Do YBM리더스 or 단어장 비비디(Vividy) have ads?

Neither YBM리더스 nor 단어장 비비디(Vividy) shows ads.

### Which is updated more often, YBM리더스 or 단어장 비비디(Vividy)?

YBM리더스 ships an update every 2 months, and 단어장 비비디(Vividy) weekly. Most recently, YBM리더스 was updated on October 5, 2026 and 단어장 비비디(Vividy) on October 16, 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.*