# BookFast 新儀科技 vs J

The clearest difference is update cadence: BookFast 新儀科技 at monthly against J's every 3 months. 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.

BookFast 新儀科技 ships an update monthly, J every 3 months. Both last shipped on September 17, 2026.

## The numbers

| Metric | BookFast 新儀科技 | J |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 86 MB | 81 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [NewPOS TECHNOLOGY CORPORATION](https://appshunter.io/developer/1078540734) | [weichieh lin](https://appshunter.io/developer/1683777188) |

## What reviewers say

### BookFast 新儀科技

[App page](https://appshunter.io/ios/app/bookfast/id1591578047)

**Features:** macOS Compatibility

**In-app purchases:** none


### J

[App page](https://appshunter.io/ios/app/j-lin-infinity/id1643486063)

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

**In-app purchases:** none


## Frequently asked questions

### Is BookFast 新儀科技 free?

BookFast 新儀科技 is free to download, with no in-app purchases.

### Is J free?

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

### Do BookFast 新儀科技 or J have ads?

Neither BookFast 新儀科技 nor J shows ads.

### Which is updated more often, BookFast 新儀科技 or J?

BookFast 新儀科技 ships an update monthly, and J every 3 months. Most recently, BookFast 新儀科技 was updated on September 17, 2026 and J on September 17, 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.*