# Inspection SYS vs WLJJ

The clearest difference is update cadence: WLJJ at every 3 weeks against Inspection SYS's every 3 months. Inspection SYS's advantage is iOS requirement (12.0 vs 15.0). 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.

Inspection SYS ships an update every 3 months, WLJJ every 3 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Inspection SYS | WLJJ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 220 MB | 202 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [深圳市赛德爱电子有限公司/](https://appshunter.io/developer/1762773666) | [Nanjing Bote Mech Network Culture Co., Ltd](https://appshunter.io/developer/1849351740) |

## What reviewers say

### Inspection SYS

[App page](https://appshunter.io/ios/app/inspection-sys/id6593684773)

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

**In-app purchases:** none


### WLJJ

[App page](https://appshunter.io/ios/app/wljj/id6754632088)

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

**In-app purchases:** none


## Frequently asked questions

### Is Inspection SYS free?

Inspection SYS is free to download, with no in-app purchases.

### Is WLJJ free?

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

### Do Inspection SYS or WLJJ have ads?

Neither Inspection SYS nor WLJJ shows ads.

### Which is updated more often, Inspection SYS or WLJJ?

Inspection SYS ships an update every 3 months, and WLJJ every 3 weeks. Most recently, Inspection SYS was updated on October 3, 2026 and WLJJ on October 10, 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.*