# ４択化学 vs Thoth

The clearest difference is update cadence: Thoth at every 4 days against ４択化学's every 2 months. Thoth also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

４択化学 ships an update every 2 months, Thoth every 4 days. The most recent releases landed on October 20, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ４択化学 | Thoth |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 26.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 6 MB | 71 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [junpei ono](https://appshunter.io/developer/656630939) | [THOTH Inc.](https://appshunter.io/developer/6783651004) |

## 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


### Thoth

[App page](https://appshunter.io/ios/app/thoth/id6810061535)

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

**In-app purchases:** none


## Frequently asked questions

### Is ４択化学 free?

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

### Is Thoth free?

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

### Do ４択化学 or Thoth have ads?

Neither ４択化学 nor Thoth shows ads.

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

４択化学 ships an update every 2 months, and Thoth every 4 days. Most recently, ４択化学 was updated on October 20, 2026 and Thoth on October 31, 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.*