# 窗安無事 WIN SAFE vs aiM18 ESSP

The clearest difference is update cadence: aiM18 ESSP at every 3 weeks against 窗安無事 WIN SAFE's every 2 months. 窗安無事 WIN SAFE's advantage is iOS requirement (12.0 vs 15.5). On price, ads, 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.

窗安無事 WIN SAFE ships an update every 2 months, aiM18 ESSP every 3 weeks. The most recent releases landed on February 20, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 窗安無事 WIN SAFE | aiM18 ESSP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 69 MB | 70 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Buildings Department, HKSARG](https://appshunter.io/developer/888159754) | [Global Sharp International Limited](https://appshunter.io/developer/787053370) |

## What reviewers say

### 窗安無事 WIN SAFE

[App page](https://appshunter.io/ios/app/win-safe/id1616494423)

**Features:** macOS Compatibility

**In-app purchases:** none


### aiM18 ESSP

[App page](https://appshunter.io/ios/app/aim18-essp/id6478584807)

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

**In-app purchases:** none


## Frequently asked questions

### Is 窗安無事 WIN SAFE free?

窗安無事 WIN SAFE is free to download, with no in-app purchases.

### Is aiM18 ESSP free?

aiM18 ESSP is free to download, with no in-app purchases.

### Do 窗安無事 WIN SAFE or aiM18 ESSP have ads?

Neither 窗安無事 WIN SAFE nor aiM18 ESSP shows ads.

### Which is updated more often, 窗安無事 WIN SAFE or aiM18 ESSP?

窗安無事 WIN SAFE ships an update every 2 months, and aiM18 ESSP every 3 weeks. Most recently, 窗安無事 WIN SAFE was updated on February 20, 2026 and aiM18 ESSP on September 19, 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.*