# PDF Secure vs Complication Compilation

The clearest difference is price: PDF Secure at Free against Complication Compilation's $0.99. PDF Secure also leads on iOS requirement (13.0 vs 15.6). Complication Compilation's advantage is update cadence (every 2 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

PDF Secure is free to download; Complication Compilation costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PDF Secure ships an update every 9 months, Complication Compilation every 2 months. The most recent releases landed on October 11, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | PDF Secure | Complication Compilation |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (376 ratings)](https://appshunter.io/ios/app/pdf-secure/id1515466852/reviews)** | — |
| Number of ratings | **376** | — |
| Positive reviews | 98.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [iSolid apps](https://appshunter.io/developer/1215383083) | [Leon Wolf](https://appshunter.io/developer/1635221344) |

## 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


### Complication Compilation

[App page](https://appshunter.io/ios/app/complication-compilation/id6754694657)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is PDF Secure free?

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

### Is Complication Compilation free?

Complication Compilation costs $0.99, with no in-app purchases.

### Do PDF Secure or Complication Compilation have ads?

Neither PDF Secure nor Complication Compilation shows ads.

### Which is updated more often, PDF Secure or Complication Compilation?

PDF Secure ships an update every 9 months, and Complication Compilation every 2 months. Most recently, PDF Secure was updated on October 11, 2026 and Complication Compilation on September 27, 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.*