# FAST智能预警 vs 签密箱

The clearest difference is ads: 签密箱 at none against FAST智能预警's shown. FAST智能预警's advantage is update cadence (monthly vs every 2 months) and iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

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

FAST智能预警 ships an update monthly, 签密箱 every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | FAST智能预警 | 签密箱 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6472757480/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Size | 74 MB | 33 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [杭州山科智能科技股份有限公司](https://appshunter.io/developer/1785810006) | [Chongqing AoXiong Online Information Technology Co.Ltd.](https://appshunter.io/developer/1575187051) |

## What reviewers say

### FAST智能预警

[App page](https://appshunter.io/ios/app/fast/id1668965595)

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

**In-app purchases:** none


### 签密箱

[App page](https://appshunter.io/ios/app/id6472757480)

**Features:** macOS Compatibility, Safari Extension

**In-app purchases:** none


## Frequently asked questions

### Is FAST智能预警 free?

FAST智能预警 is free to download, with no in-app purchases.

### Is 签密箱 free?

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

### Do FAST智能预警 or 签密箱 have ads?

FAST智能预警 shows ads; 签密箱 does not.

### Which is updated more often, FAST智能预警 or 签密箱?

FAST智能预警 ships an update monthly, and 签密箱 every 2 months. Most recently, FAST智能预警 was updated on November 3, 2026 and 签密箱 on November 4, 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.*