# J vs Smart ADF

The clearest difference is iOS requirement: Smart ADF at 12.0 against J's 15.6. 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.

J ships an update every 3 months, Smart ADF every 6 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | J | Smart ADF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Size | 30 MB | 38 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [深圳市佳士科技股份有限公司](https://appshunter.io/developer/1494882581) | [TECMEN ELECTRONICS CO.,LTD](https://appshunter.io/developer/1773240509) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-weld/id6469101974)

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

**In-app purchases:** none


### Smart ADF

[App page](https://appshunter.io/ios/app/smart-adf/id6736734587)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is Smart ADF free?

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

### Do J or Smart ADF have ads?

Neither J nor Smart ADF shows ads.

### Which is updated more often, J or Smart ADF?

J ships an update every 3 months, and Smart ADF every 6 weeks. Most recently, J was updated on October 14, 2026 and Smart ADF on October 3, 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.*