# PDF Converter App vs Sonar

The clearest difference is update cadence: Sonar at every 3 weeks against PDF Converter App's every 4 months. PDF Converter App's advantage is device support (3 vs 1) and iOS requirement (12.2 vs 16.4). On price, ads and in-app purchases there is nothing between them.

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

PDF Converter App ships an update every 4 months, Sonar every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Converter App | Sonar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/pdf-converter-app/id1524316267/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 55 MB |
| Requires iOS | **12.2** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alexei Jovmir](https://appshunter.io/developer/1103219829) | [Caue Mattos Silvestre](https://appshunter.io/developer/6780304569) |

## What reviewers say

### PDF Converter App

[App page](https://appshunter.io/ios/app/pdf-converter-app/id1524316267)

Easily reformat PDF files into popular document and image formats. Save converted files locally or share them via email and other tools. Features a clear and simple user interface.

**Highlights:** Convert PDF to docx, txt, html, rtf, bmp, jpg, gif, psd, png, epub, Support for Word, Powerpoint, Pages, Numbers, Keynote formats, Save converted files locally, Share converted documents via email, Clear and simple UI, First conversion is free

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Conversions | $0.99 | one-time |
| 25 Conversions | $1.99 | one-time |
| 50 Conversions | $2.99 | one-time |


### Sonar

[App page](https://appshunter.io/ios/app/sonar-hidden-camera-detector/id6788882245)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly Subscription | $8.99 | per month |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is PDF Converter App free?

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

### Is Sonar free?

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

### Do PDF Converter App or Sonar have ads?

Neither PDF Converter App nor Sonar shows ads.

### Which is updated more often, PDF Converter App or Sonar?

PDF Converter App ships an update every 4 months, and Sonar every 3 weeks. Most recently, PDF Converter App was updated on November 3, 2026 and Sonar on October 31, 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.*