# J vs bluetag

The clearest difference is iOS requirement: J at 10.0 against bluetag's 16.6. 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 weekly, bluetag every 2 weeks. The most recent releases landed on October 4, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | J | bluetag |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 18 MB | 35 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hong Kong Jewelry Manufacturers' Association Ltd](https://appshunter.io/developer/687190980) | [东莞蓝签科技有限公司](https://appshunter.io/developer/1613305637) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-hub/id1567558397)

**Features:** macOS Compatibility

**In-app purchases:** none


### bluetag

[App page](https://appshunter.io/ios/app/bluetag/id1613305635)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is bluetag free?

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

### Do J or bluetag have ads?

Neither J nor bluetag shows ads.

### Which is updated more often, J or bluetag?

J ships an update weekly, and bluetag every 2 weeks. Most recently, J was updated on October 4, 2026 and bluetag on September 25, 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.*