# 建标库HD vs CroReader

The clearest difference is price: 建标库HD at Free against CroReader's $1.99. 建标库HD also leads on iOS requirement (8.0 vs 17.6). CroReader's advantage is update cadence (every 5 days vs every 7 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

建标库HD is free to download; CroReader costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

建标库HD ships an update every 7 months, CroReader every 5 days. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 建标库HD | CroReader |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hd/id589314959/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 54.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 29 MB | 30 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Luoyang Jianbiao Library Network Technology Co., Ltd.](https://appshunter.io/developer/1460554486) | [健 陆](https://appshunter.io/developer/1858980070) |

## 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


### CroReader

[App page](https://appshunter.io/ios/app/croreader/id6762633422)

A minimalist local eBook reader for iPhone that offers a distraction-free reading experience. Import your books in various formats and customize your reading layout with adjustable fonts, themes, and spacing. Enjoy realistic page-turning animations for a comfortable, immersive session.

**Highlights:** Supports TXT, MOBI, EPUB formats, Customizable background themes, Multiple reading fonts (custom import), Adjustable font size, line spacing, margins, Immersive reading mode, Realistic page-turning animation

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

**In-app purchases:** none


## Frequently asked questions

### Is 建标库HD free?

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

### Is CroReader free?

CroReader costs $1.99, with no in-app purchases.

### Do 建标库HD or CroReader have ads?

Neither 建标库HD nor CroReader shows ads.

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

建标库HD ships an update every 7 months, and CroReader every 5 days. Most recently, 建标库HD was updated on October 12, 2026 and CroReader on October 20, 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.*