# B+ 必订火 vs 优订通HD

The clearest difference is update cadence: B+ 必订火 at every 10 days against 优订通HD's every 2 months. B+ 必订火 also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

B+ 必订火 ships an update every 10 days, 优订通HD every 2 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | B+ 必订火 | 优订通HD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Size | 35 MB | 24 MB |
| Requires iOS | 9.0 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 17+ | 4+ |
| Developer | [Hangzhou ShuyingZhilian Technology Co., Ltd.](https://appshunter.io/developer/1330551257) | [彩花 刘](https://appshunter.io/developer/1276503153) |

## What reviewers say

### B+ 必订火

[App page](https://appshunter.io/ios/app/b-plus/id1321867550)

**Features:** macOS Compatibility

**In-app purchases:** none


### 优订通HD

[App page](https://appshunter.io/ios/app/hd/id1361453449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is B+ 必订火 free?

B+ 必订火 is free to download, with no in-app purchases.

### Is 优订通HD free?

优订通HD is free to download, with no in-app purchases.

### Do B+ 必订火 or 优订通HD have ads?

Neither B+ 必订火 nor 优订通HD shows ads.

### Which is updated more often, B+ 必订火 or 优订通HD?

B+ 必订火 ships an update every 10 days, and 优订通HD every 2 months. Most recently, B+ 必订火 was updated on September 29, 2026 and 优订通HD on October 2, 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.*