# ４択化学 vs Math AI

The clearest difference is in-app purchases: ４択化学 at none against Math AI's 3. ４択化学 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Math AI sells 3 in-app purchases, starting at $6.99 per 7 days. ４択化学 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ４択化学 | Math AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 26.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Size | 6 MB | 39 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [junpei ono](https://appshunter.io/developer/656630939) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### ４択化学

[App page](https://appshunter.io/ios/app/id960647263)

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

**In-app purchases:** none


### Math AI

[App page](https://appshunter.io/ios/app/math-ai-solver-and-scanner/id6757243558)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $6.99 | per 7 days |
| Premium Yearly Plan | $34.99 | per year |
| Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is ４択化学 free?

４択化学 is free to download, with no in-app purchases.

### Is Math AI free?

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

### Do ４択化学 or Math AI have ads?

Math AI shows ads; ４択化学 does not.

### Which is updated more often, ４択化学 or Math AI?

４択化学 ships an update every 2 months, and Math AI every 2 months. Most recently, ４択化学 was updated on October 3, 2026 and Math AI on October 12, 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.*