# 3927 vs 更新書房

The clearest difference is in-app purchases: 3927 at none against 更新書房's 6. 更新書房's advantage is update cadence (every 11 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 更新書房 sells 6 one-off in-app purchases. 3927 asks for nothing beyond the download.

3927 ships an update every 6 weeks, 更新書房 every 11 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 3927 | 更新書房 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/id6444354605/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 11 days** |
| Monetization | Free | — |
| Size | 238 MB | 49 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [PhraKhamphee](https://appshunter.io/developer/1711138401) | [Christian Renewal Ministries Inc.](https://appshunter.io/developer/1654105942) |

## What reviewers say

### 3927

[App page](https://appshunter.io/ios/app/3927/id1616462747)

A platform for indexing and quickly retrieving information using reference numbers. Users can input a data identifier to access specific details.

**Highlights:** Data indexing platform, Quick information retrieval, Input data reference numbers, View specific details

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

**In-app purchases:** none


### 更新書房

[App page](https://appshunter.io/ios/app/id6444354605)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| $1.99 | $1.99 | one-time |
| $5.99 | $5.99 | one-time |
| $9.99 | $9.99 | one-time |
| $19.99 | $19.99 | one-time |
| $49.99 | $49.99 | one-time |
| $99.99 | $99.99 | one-time |


## Frequently asked questions

### Is 3927 free?

3927 is free to download, with no in-app purchases.

### Is 更新書房 free?

更新書房 is free to download, with in-app purchases available.

### Do 3927 or 更新書房 have ads?

Neither 3927 nor 更新書房 shows ads.

### Which is updated more often, 3927 or 更新書房?

3927 ships an update every 6 weeks, and 更新書房 every 11 days. Most recently, 3927 was updated on October 24, 2026 and 更新書房 on October 24, 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.*