# Thoth vs 化学マスター

The clearest difference is iOS requirement: Thoth at 15.1 against 化学マスター's 18.0. On price, update cadence, 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.

Thoth ships an update every 2 days, 化学マスター every 4 days. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Thoth | 化学マスター |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 61 MB | 9 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [THOTH Inc.](https://appshunter.io/developer/6783651004) | [ryo otsuka](https://appshunter.io/developer/6788628020) |

## What reviewers say

### Thoth

[App page](https://appshunter.io/ios/app/thoth/id6783651002)

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

**In-app purchases:** none


### 化学マスター

[App page](https://appshunter.io/ios/app/id6788745347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thoth free?

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

### Is 化学マスター free?

化学マスター is free to download, with no in-app purchases.

### Do Thoth or 化学マスター have ads?

Neither Thoth nor 化学マスター shows ads.

### Which is updated more often, Thoth or 化学マスター?

Thoth ships an update every 2 days, and 化学マスター every 4 days. Most recently, Thoth was updated on September 18, 2026 and 化学マスター on September 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.*