# Flash vs 워크히어24 스터디히어24

The clearest difference is update cadence: 워크히어24 스터디히어24 at monthly against Flash's every 4 months. 워크히어24 스터디히어24 also leads on iOS requirement (15.6 vs 17.0). 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.

Flash ships an update every 4 months, 워크히어24 스터디히어24 monthly. The most recent releases landed on September 18, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Flash | 워크히어24 스터디히어24 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 16 MB | 68 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yeeun seo](https://appshunter.io/developer/1634215603) | [OHRAE Inc.](https://appshunter.io/developer/1161656350) |

## What reviewers say

### Flash

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

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

**In-app purchases:** none


### 워크히어24 스터디히어24

[App page](https://appshunter.io/ios/app/24-24/id6443857995)

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

**In-app purchases:** none


## Frequently asked questions

### Is Flash free?

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

### Is 워크히어24 스터디히어24 free?

워크히어24 스터디히어24 is free to download, with no in-app purchases.

### Do Flash or 워크히어24 스터디히어24 have ads?

Neither Flash nor 워크히어24 스터디히어24 shows ads.

### Which is updated more often, Flash or 워크히어24 스터디히어24?

Flash ships an update every 4 months, and 워크히어24 스터디히어24 monthly. Most recently, Flash was updated on September 18, 2026 and 워크히어24 스터디히어24 on September 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.*