# 数学公式チェック vs EssAI

The clearest difference is update cadence: 数学公式チェック at every 2 weeks against EssAI's every 6 weeks. 数学公式チェック also leads on iOS requirement (6.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 数学公式チェック sells 1 one-off in-app purchase and EssAI sells 2 in-app purchases, starting at $22.99 per 3 months. Whichever you choose, the download price is not the number that matters.

数学公式チェック ships an update every 2 weeks, EssAI every 6 weeks. The most recent releases landed on October 26, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 数学公式チェック | EssAI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Size | 8 MB | 41 MB |
| Requires iOS | **6.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shinichiro Shiba](https://appshunter.io/developer/876799918) | [RYUKI KONNAMI](https://appshunter.io/developer/6779120785) |

## What reviewers say

### 数学公式チェック

[App page](https://appshunter.io/ios/app/id909857086)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数学公式チェック広告削除 | $0.99 | one-time |


### EssAI

[App page](https://appshunter.io/ios/app/essai/id6782609699)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| シーズンパス（3ヶ月） | $22.99 | per 3 months |
| スタンダード（年額） | $59.99 | per year |


## Frequently asked questions

### Is 数学公式チェック free?

数学公式チェック is free to download, with in-app purchases available.

### Is EssAI free?

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

### Do 数学公式チェック or EssAI have ads?

Neither 数学公式チェック nor EssAI shows ads.

### Which is updated more often, 数学公式チェック or EssAI?

数学公式チェック ships an update every 2 weeks, and EssAI every 6 weeks. Most recently, 数学公式チェック was updated on October 26, 2026 and EssAI on October 18, 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.*