# PDF Secure vs Hidden Cameras

The clearest difference is review sentiment: PDF Secure at 99% against Hidden Cameras's 0%. PDF Secure also leads on rating (4.8 vs 4.1) and in-app purchases (none vs 3). Hidden Cameras's advantage is update cadence (every 2 days vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Hidden Cameras sells 3 in-app purchases, starting at $6.99 per 7 days. PDF Secure asks for nothing beyond the download.

PDF Secure holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: PDF Secure has 383 ratings behind it against 38, so its average is the more settled of the two. Written reviews point the same way: 99% of PDF Secure's written reviews are positive against 0% of Hidden Cameras's.

PDF Secure ships an update every 9 months, Hidden Cameras every 2 days. The most recent releases landed on November 7, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | PDF Secure | Hidden Cameras |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (383 ratings)](https://appshunter.io/ios/app/pdf-secure/id1515466852/reviews)** | [4.1 (38 ratings)](https://appshunter.io/ios/app/hidden-cameras-spy-detector/id6621265179/reviews) |
| Number of ratings | **383** | 38 |
| Positive reviews | **98.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 55 MB |
| Requires iOS | **13.0** | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iSolid apps](https://appshunter.io/developer/1215383083) | [Felix Janssens](https://appshunter.io/developer/1762028150) |

## What reviewers say

### PDF Secure

[App page](https://appshunter.io/ios/app/pdf-secure/id1515466852)

Secure your PDF documents by adding password protection, ensuring they cannot be opened without authorization. You can also easily remove existing password protection from your files. This app offers a straightforward process for safeguarding your sensitive information.

**Highlights:** Password protect PDF documents, Remove PDF password protection, Cross-platform compatibility, Export to various locations, Dark mode support

**In-app purchases:** none


### Hidden Cameras

[App page](https://appshunter.io/ios/app/hidden-cameras-spy-detector/id6621265179)

This app helps protect your privacy by scanning your surroundings for hidden surveillance devices. It detects signals from cameras and microphones using advanced Bluetooth and Wi-Fi scanning technology, providing real-time alerts and detailed information about potential threats.

**Highlights:** Detects hidden surveillance devices, Scans for cameras and microphones, Uses Bluetooth and Wi-Fi signals, Provides detailed device information, Offers real-time threat alerts, Premium features for extended range

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial | $6.99 | per 7 days |
| Monthly Trial | $14.99 | per month |
| Yearly Trial | $31.99 | per year |


## Frequently asked questions

### Is PDF Secure free?

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

### Is Hidden Cameras free?

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

### Which has better reviews, PDF Secure or Hidden Cameras?

PDF Secure is rated higher. PDF Secure averages 4.8 out of 5 from 383 ratings, while Hidden Cameras averages 4.1 from 38 ratings.

### Do PDF Secure or Hidden Cameras have ads?

Neither PDF Secure nor Hidden Cameras shows ads.

### Which is updated more often, PDF Secure or Hidden Cameras?

PDF Secure ships an update every 9 months, and Hidden Cameras every 2 days. Most recently, PDF Secure was updated on November 7, 2026 and Hidden Cameras on November 12, 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.*