# 建标库HD vs 阅界

The clearest difference is in-app purchases: 建标库HD at none against 阅界's 3. 建标库HD also leads on iOS requirement (8.0 vs 15.6). 阅界's advantage is update cadence (weekly vs every 7 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. 阅界 sells 3 in-app purchases, starting at $1.99 per month. 建标库HD asks for nothing beyond the download.

建标库HD ships an update every 7 months, 阅界 weekly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 建标库HD | 阅界 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hd/id589314959/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 53.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 29 MB | 10 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Luoyang Jianbiao Library Network Technology Co., Ltd.](https://appshunter.io/developer/1460554486) | [宁伟 陈](https://appshunter.io/developer/1801975672) |

## What reviewers say

### 建标库HD

[App page](https://appshunter.io/ios/app/hd/id589314959)

Access a comprehensive collection of architectural standards, regulations, and technical resources. This platform offers a community for industry professionals to exchange knowledge and stay updated on the latest building codes and practices.

**Highlights:** Extensive building standards and regulations, Large collection of architectural resources, Technical exchange community, Updated national and industry standards, Improved display and browsing experience, Update reminders and convenient downloads

**Features:** macOS Compatibility

**In-app purchases:** none


### 阅界

[App page](https://appshunter.io/ios/app/id6744491327)

This app serves as a versatile document reader, supporting over 30 formats including CHM, Office documents, and PDFs. It offers a streamlined reading experience with features like a night mode, font scaling, and fast loading times, making it ideal for students, professionals, and avid readers.

**Highlights:** Supports 30+ document formats, Perfect CHM file parsing, Night mode and font scaling, Fast document loading, Zip file decompression, Office suite compatibility

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 年度会员 | $9.99 | per year |
| 永久会员 | $12.99 | one-time |


## Frequently asked questions

### Is 建标库HD free?

建标库HD is free to download, with no in-app purchases.

### Is 阅界 free?

阅界 is free to download, with in-app purchases available.

### Do 建标库HD or 阅界 have ads?

Neither 建标库HD nor 阅界 shows ads.

### Which is updated more often, 建标库HD or 阅界?

建标库HD ships an update every 7 months, and 阅界 weekly. Most recently, 建标库HD was updated on October 12, 2026 and 阅界 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.*