# 正航NBS vs 建发安全

The clearest difference is iOS requirement: 建发安全 at 13.0 against 正航NBS's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

正航NBS ships an update every 5 weeks, 建发安全 every 3 weeks. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 正航NBS | 建发安全 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 8 MB | 72 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHING HANG](https://appshunter.io/developer/548240045) | [厦门兆慧网络科技有限公司](https://appshunter.io/developer/1282830323) |

## What reviewers say

### 正航NBS

[App page](https://appshunter.io/ios/app/nbs/id6448622361)

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

**In-app purchases:** none


### 建发安全

[App page](https://appshunter.io/ios/app/id6449524717)

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

**In-app purchases:** none


## Frequently asked questions

### Is 正航NBS free?

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

### Is 建发安全 free?

建发安全 is free to download, with no in-app purchases.

### Do 正航NBS or 建发安全 have ads?

Neither 正航NBS nor 建发安全 shows ads.

### Which is updated more often, 正航NBS or 建发安全?

正航NBS ships an update every 5 weeks, and 建发安全 every 3 weeks. Most recently, 正航NBS was updated on October 30, 2026 and 建发安全 on October 29, 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.*