# PDF Converter vs 录音机

PDF Converter and 录音机 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $4.99 per 7 days and 录音机 sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Converter ships an update weekly, 录音机 every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF Converter | 录音机 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 9 MB | 35 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [添 邱](https://appshunter.io/developer/1819535113) | [刚 唐](https://appshunter.io/developer/1828084566) |

## What reviewers say

### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-file-conversion/id6751520980)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter Weekly | $4.99 | per 7 days |
| PDF Converter Annual | $29.99 | per year |


### 录音机

[App page](https://appshunter.io/ios/app/id6755291357)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 专业手机录音机限时特惠周会员 | $2.99 | per 7 days |
| 专业手机录音机限时特惠月会员 | $4.99 | per month |
| 专业手机录音机限时特惠年会员 | $24.99 | per year |


## Frequently asked questions

### Is PDF Converter free?

PDF Converter is free to download, with in-app purchases available.

### Is 录音机 free?

录音机 is free to download, with in-app purchases available.

### Do PDF Converter or 录音机 have ads?

Neither PDF Converter nor 录音机 shows ads.

### Which is updated more often, PDF Converter or 录音机?

PDF Converter ships an update weekly, and 录音机 every 4 days. Most recently, PDF Converter was updated on October 28, 2026 and 录音机 on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*