# PDF Converter vs NSD Detector

The clearest difference is in-app purchases: NSD Detector at none against PDF Converter's 2. NSD Detector also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $2.99 per month. NSD Detector asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 27, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | PDF Converter | NSD Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (531 ratings)](https://appshunter.io/ios/app/pdf-converter/id6470334944/reviews)** | — |
| Number of ratings | **531** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 39 MB | 34 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [晓珍 胡](https://appshunter.io/developer/1673886500) | [NEURO SCAN DETECTOR LTD](https://appshunter.io/developer/1895586615) |

## What reviewers say

### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter/id6470334944)

Easily convert photos and various document types into high-quality PDF files. This tool also allows you to split existing PDFs or merge multiple PDF documents into a single file.

**Highlights:** Convert photos to PDF, Import and merge various file formats (Word, Excel, PPT) to PDF, Split PDF files, Merge multiple PDF files, High-quality PDF creation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Annual Plan | $9.99 | per year |

**What reviewers like**

- 👍 Excellent app
- 🚀 Super fast
- 👍 Good
- 👍 Great
- 👍 Good app

**What reviewers complain about**

- 😠 Charged for free trial
- 😠 Horrible app
- 😠 Does not do as mentioned
- 😠 Invasive advertising
- 😠 Very buggy

**Reported bugs**

- App does not convert files as advertised
- Invasive advertising slows down operations

**Requested features**

- Open PDF page


### NSD Detector

[App page](https://appshunter.io/ios/app/nsd-detector/id6763984979)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Converter free?

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

### Is NSD Detector free?

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

### Do PDF Converter or NSD Detector have ads?

PDF Converter shows ads; NSD Detector does not.

### Which is updated more often, PDF Converter or NSD Detector?

PDF Converter ships an update every 2 months, and NSD Detector every 2 months. Most recently, PDF Converter was updated on September 27, 2026 and NSD Detector on September 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.*