# 蔵書管理 vs 思考を深掘る

The clearest difference is in-app purchases: 思考を深掘る at none against 蔵書管理's 1. 思考を深掘る also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 蔵書管理 sells 1 one-off in-app purchase. 思考を深掘る asks for nothing beyond the download.

蔵書管理 ships an update every 2 months, 思考を深掘る every 3 weeks. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 蔵書管理 | 思考を深掘る |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 35 MB | 68 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [naoto higashiya](https://appshunter.io/developer/1859691605) | [Daichi Tsuchiya](https://appshunter.io/developer/1588066592) |

## What reviewers say

### 蔵書管理

[App page](https://appshunter.io/ios/app/id6756271812)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | one-time |


### 思考を深掘る

[App page](https://appshunter.io/ios/app/mindbrew/id6761913046)

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

**In-app purchases:** none


## Frequently asked questions

### Is 蔵書管理 free?

蔵書管理 is free to download, with in-app purchases available.

### Is 思考を深掘る free?

思考を深掘る is free to download, with no in-app purchases.

### Do 蔵書管理 or 思考を深掘る have ads?

蔵書管理 shows ads; 思考を深掘る does not.

### Which is updated more often, 蔵書管理 or 思考を深掘る?

蔵書管理 ships an update every 2 months, and 思考を深掘る every 3 weeks. Most recently, 蔵書管理 was updated on October 6, 2026 and 思考を深掘る on October 25, 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.*