# 三元催化风向标 vs 比亚迪销售通

The clearest difference is in-app purchases: 比亚迪销售通 at none against 三元催化风向标's 10. 比亚迪销售通 also leads on ads (none vs shown) and update cadence (weekly vs every 2 months). 三元催化风向标's advantage is iOS requirement (13.0 vs 15). On price and device support there is nothing between them.

Both are free to download. 三元催化风向标 sells 10 one-off in-app purchases. 比亚迪销售通 asks for nothing beyond the download.

三元催化风向标 ships an update every 2 months, 比亚迪销售通 weekly. The most recent releases landed on September 8, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 三元催化风向标 | 比亚迪销售通 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Size | 35 MB | 217 MB |
| Requires iOS | **13.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Youyu Technology Co., Ltd.](https://appshunter.io/developer/1190014252) | [BYD Company Limited](https://appshunter.io/developer/785163263) |

## What reviewers say

### 三元催化风向标

[App page](https://appshunter.io/ios/app/id1542725614)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus体验卡1天 | $3.99 | one-time |
| 初级 66次(3个月) | $19.99 | one-time |
| 初级 300次(1年) | $59.99 | one-time |
| 团队版(1个月) | $69.99 | one-time |
| 专业版Plus（2个月） | $99.99 | one-time |
| 团队版(2个月) | $129.99 | one-time |
| 专业版Plus（半年） | $249.99 | one-time |
| 团队版(半年) | $349.99 | one-time |
| 专业版Plus（1年） | $499.99 | one-time |
| 团队版（一年） | $599.99 | one-time |


### 比亚迪销售通

[App page](https://appshunter.io/ios/app/id6744042006)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 三元催化风向标 free?

三元催化风向标 is free to download, with in-app purchases available.

### Is 比亚迪销售通 free?

比亚迪销售通 is free to download, with no in-app purchases.

### Do 三元催化风向标 or 比亚迪销售通 have ads?

三元催化风向标 shows ads; 比亚迪销售通 does not.

### Which is updated more often, 三元催化风向标 or 比亚迪销售通?

三元催化风向标 ships an update every 2 months, and 比亚迪销售通 weekly. Most recently, 三元催化风向标 was updated on September 8, 2026 and 比亚迪销售通 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.*