# 生物マスター vs Thoth

The clearest difference is in-app purchases: Thoth at none against 生物マスター's 1. Thoth also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 生物マスター sells 1 one-off in-app purchase. Thoth asks for nothing beyond the download.

生物マスター ships an update every 8 days, Thoth every 5 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | 生物マスター | Thoth |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 5 days** |
| Size | 38 MB | 73 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ryo otsuka](https://appshunter.io/developer/6788628020) | [THOTH Inc.](https://appshunter.io/developer/6783651004) |

## What reviewers say

### 生物マスター

[App page](https://appshunter.io/ios/app/id6796595184)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 生物マスター Pro | $2.99 | one-time |


### Thoth

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 生物マスター free?

生物マスター is free to download, with in-app purchases available.

### Is Thoth free?

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

### Do 生物マスター or Thoth have ads?

Neither 生物マスター nor Thoth shows ads.

### Which is updated more often, 生物マスター or Thoth?

生物マスター ships an update every 8 days, and Thoth every 5 days. Most recently, 生物マスター was updated on October 24, 2026 and Thoth on October 26, 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.*