# PDF. Scanner. vs Sound Power

The clearest difference is in-app purchases: Sound Power at none against PDF. Scanner.'s 3. Sound Power also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDF. Scanner. sells 3 one-off in-app purchases. Sound Power asks for nothing beyond the download.

PDF. Scanner. ships an update every 3 weeks, Sound Power every 5 weeks. The most recent releases landed on October 20, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PDF. Scanner. | Sound Power |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 22 MB | 94 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Juergen Koller Software GmbH](https://appshunter.io/developer/1604001664) | [Svantek Sp. z o.o.](https://appshunter.io/developer/1112855123) |

## What reviewers say

### PDF. Scanner.

[App page](https://appshunter.io/ios/app/pdf-scanner/id6472706694)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 AI Names | $1.99 | one-time |
| 200 AI Names | $4.99 | one-time |
| 500 AI Names | $8.99 | one-time |


### Sound Power

[App page](https://appshunter.io/ios/app/sound-power/id6738689537)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF. Scanner. free?

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

### Is Sound Power free?

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

### Do PDF. Scanner. or Sound Power have ads?

Neither PDF. Scanner. nor Sound Power shows ads.

### Which is updated more often, PDF. Scanner. or Sound Power?

PDF. Scanner. ships an update every 3 weeks, and Sound Power every 5 weeks. Most recently, PDF. Scanner. was updated on October 20, 2026 and Sound Power on October 27, 2026.

---

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