# YomiFlash vs Math Bird Challenge

The clearest difference is in-app purchases: Math Bird Challenge at none against YomiFlash's 1. Math Bird Challenge also leads on review sentiment (100% vs 67%). YomiFlash's advantage is ads (none vs shown) and iOS requirement (7.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. YomiFlash sells 1 one-off in-app purchase. Math Bird Challenge asks for nothing beyond the download.

## The numbers

| Metric | YomiFlash | Math Bird Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | — |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 18 MB | 36 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motoki Nakama](https://appshunter.io/developer/554356896) | [Tomohiro Kosaka](https://appshunter.io/developer/1095373790) |

## What reviewers say

### YomiFlash

[App page](https://appshunter.io/ios/app/yomiflash/id554356893)

This app uses flashcards to help children study Japanese vocabulary, including Kanji. It features adjustable flash speeds, sound options, and a large display for words. Categories cover family, body parts, food, creatures, and daily life.

**Highlights:** Japanese words including Kanji, Adjustable flash speed, Large full-screen words, Sound ON/OFF option, Multiple word categories, Easy operation with Panel View

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Advertisement | $2.99 | one-time |


### Math Bird Challenge

[App page](https://appshunter.io/ios/app/math-bird-challenge/id6756185149)

This app makes learning arithmetic engaging by combining classic arcade gameplay with math challenges. Players tap to navigate obstacles while solving addition and subtraction problems, with difficulty increasing as their score rises. It's designed for children aged 5-12 to build math skills through fun, reward-based play.

**Highlights:** Arithmetic practice integrated with gameplay, Progressive difficulty levels, Strengthens mental arithmetic, Improves calculation speed, Works offline, Simple one-tap controls

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

**In-app purchases:** none


## Frequently asked questions

### Is YomiFlash free?

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

### Is Math Bird Challenge free?

Math Bird Challenge is free to download, with no in-app purchases.

### Do YomiFlash or Math Bird Challenge have ads?

Math Bird Challenge shows ads; YomiFlash does not.

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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.*