# 오딩가 잉글리시 vs Flash

The clearest difference is in-app purchases: Flash at none against 오딩가 잉글리시's 4. 오딩가 잉글리시's advantage is ads (none vs shown) and update cadence (monthly vs every 3 months). On price and device support there is nothing between them.

Both are free to download. 오딩가 잉글리시 sells 4 in-app purchases, starting at $12.00 per month. Flash asks for nothing beyond the download.

오딩가 잉글리시 ships an update monthly, Flash every 3 months. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 오딩가 잉글리시 | Flash |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Size | 855 MB | 29 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [THE PLAN G](https://appshunter.io/developer/1459599505) | [yeeun seo](https://appshunter.io/developer/1634215603) |

## What reviewers say

### 오딩가 잉글리시

[App page](https://appshunter.io/ios/app/id1510683896)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YBM Subscription | $12.00 | per month |
| YBM contents | $12.00 | per month |
| odinga's package subscription | $14.99 | per month |
| Odinga's package | $14.99 | per month |


### Flash

[App page](https://appshunter.io/ios/app/flash-mental-math/id1634215601)

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

**In-app purchases:** none


## Frequently asked questions

### Is 오딩가 잉글리시 free?

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

### Is Flash free?

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

### Do 오딩가 잉글리시 or Flash have ads?

Flash shows ads; 오딩가 잉글리시 does not.

### Which is updated more often, 오딩가 잉글리시 or Flash?

오딩가 잉글리시 ships an update monthly, and Flash every 3 months. Most recently, 오딩가 잉글리시 was updated on October 6, 2026 and Flash on October 5, 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.*