# pdf转换器 vs Pithy

The clearest difference is in-app purchases: Pithy at none against pdf转换器's 2. Pithy also leads on update cadence (every 3 days vs every 4 weeks). pdf转换器's advantage is iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. pdf转换器 sells 2 in-app purchases, starting at $4.99 per 7 days. Pithy asks for nothing beyond the download.

pdf转换器 ships an update every 4 weeks, Pithy every 3 days. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | pdf转换器 | Pithy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Size | 20 MB | 19 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [文 罗](https://appshunter.io/developer/1709424450) | [慧 王](https://appshunter.io/developer/1540476650) |

## What reviewers say

### pdf转换器

[App page](https://appshunter.io/ios/app/pdf/id6472162112)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $4.99 | per 7 days |
| 月会员 | $12.99 | per month |


### Pithy

[App page](https://appshunter.io/ios/app/pithy-image-converter/id6720709207)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is pdf转换器 free?

pdf转换器 is free to download, with in-app purchases available.

### Is Pithy free?

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

### Do pdf转换器 or Pithy have ads?

Neither pdf转换器 nor Pithy shows ads.

### Which is updated more often, pdf转换器 or Pithy?

pdf转换器 ships an update every 4 weeks, and Pithy every 3 days. Most recently, pdf转换器 was updated on September 22, 2026 and Pithy on September 14, 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.*