# NBTC e vs 建标库

The clearest difference is in-app purchases: NBTC e at none against 建标库's 3. 建标库's advantage is update cadence (fortnightly vs every 4 months) and iOS requirement (9.0 vs 12.1). On price, ads and device support there is nothing between them.

Both are free to download. 建标库 sells 3 one-off in-app purchases. NBTC e asks for nothing beyond the download.

NBTC e ships an update every 4 months, 建标库 fortnightly. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NBTC e | 建标库 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1269063051/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 21 MB | 67 MB |
| Requires iOS | 12.1 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Office of The National Broadcasting and Telecommunications Commission](https://appshunter.io/developer/721507053) | [Luoyang Jianbiao Library Network Technology Co., Ltd.](https://appshunter.io/developer/1460554486) |

## What reviewers say

### NBTC e

[App page](https://appshunter.io/ios/app/nbtc-e-library/id955374020)

**Features:** macOS Compatibility

**In-app purchases:** none


### 建标库

[App page](https://appshunter.io/ios/app/id1269063051)

Access a vast library of architectural engineering resources, including standards, blueprints, and a community forum. This platform has been dedicated to providing digital standards for over two decades, investing millions annually to maintain its extensive collection.

**Highlights:** Millions of architectural engineering resources, Comprehensive standards and specifications, Extensive blueprint and model library, Active technical exchange community, Digital standards service

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| “一年VIP服务，下载全部规范等（不含图集）” | $24.99 | one-time |
| “三年VIP服务，下载全部规范等（不含图集）” | $49.99 | one-time |
| “永久VIP服务(不含图集)，下载全部规范等” | $99.99 | one-time |


## Frequently asked questions

### Is NBTC e free?

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

### Is 建标库 free?

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

### Do NBTC e or 建标库 have ads?

Neither NBTC e nor 建标库 shows ads.

### Which is updated more often, NBTC e or 建标库?

NBTC e ships an update every 4 months, and 建标库 fortnightly. Most recently, NBTC e was updated on October 18, 2026 and 建标库 on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*