# 行云换电助手 vs PM Fragrance

The clearest difference is ads: PM Fragrance at none against 行云换电助手's shown. 行云换电助手's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support 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.

行云换电助手 ships an update every 3 weeks, PM Fragrance every 2 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 行云换电助手 | PM Fragrance |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 51 MB | 18 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Hangzhou Xingyun Power Source Technology Co., Ltd.](https://appshunter.io/developer/1681532422) | [Shenzhen Zhizhen Automobile Electronic Technology Co., Ltd.](https://appshunter.io/developer/1501790302) |

## What reviewers say

### 行云换电助手

[App page](https://appshunter.io/ios/app/id6444427331)

**Features:** macOS Compatibility

**In-app purchases:** none


### PM Fragrance

[App page](https://appshunter.io/ios/app/pm-fragrance/id6478580216)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 行云换电助手 free?

行云换电助手 is free to download, with no in-app purchases.

### Is PM Fragrance free?

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

### Do 行云换电助手 or PM Fragrance have ads?

行云换电助手 shows ads; PM Fragrance does not.

### Which is updated more often, 行云换电助手 or PM Fragrance?

行云换电助手 ships an update every 3 weeks, and PM Fragrance every 2 months. Most recently, 行云换电助手 was updated on November 3, 2026 and PM Fragrance on October 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.*