# J vs Wisdometal Lock

The clearest difference is update cadence: Wisdometal Lock at monthly against J's every 10 months. J's advantage is iOS requirement (8.0 vs 14.0). 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.

J ships an update every 10 months, Wisdometal Lock monthly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | J | Wisdometal Lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Size | 79 MB | 18 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Xunzhong Communication Technology Co., Ltd.](https://appshunter.io/developer/821439465) | [WISDOMETAL Technology (Guangdong) Co., Ltd.](https://appshunter.io/developer/1808351620) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-rooms-controller/id1536553888)

**In-app purchases:** none


### Wisdometal Lock

[App page](https://appshunter.io/ios/app/wisdometal-lock/id6744594845)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is Wisdometal Lock free?

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

### Do J or Wisdometal Lock have ads?

Neither J nor Wisdometal Lock shows ads.

### Which is updated more often, J or Wisdometal Lock?

J ships an update every 10 months, and Wisdometal Lock monthly. Most recently, J was updated on October 27, 2026 and Wisdometal Lock on October 28, 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.*