# PDF Secure vs Al Dia App

The clearest difference is update cadence: Al Dia App at every 2 months against PDF Secure's every 9 months. PDF Secure's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PDF Secure ships an update every 9 months, Al Dia App every 2 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PDF Secure | Al Dia App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (382 ratings)](https://appshunter.io/ios/app/pdf-secure/id1515466852/reviews)** | — |
| Number of ratings | **382** | — |
| 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 | 35 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iSolid apps](https://appshunter.io/developer/1215383083) | [Gino Adriano Pastran Mota](https://appshunter.io/developer/1892115483) |

## 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


### Al Dia App

[App page](https://appshunter.io/ios/app/al-dia-app/id6761927781)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Secure free?

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

### Is Al Dia App free?

Al Dia App is free to download, with no in-app purchases.

### Do PDF Secure or Al Dia App have ads?

Neither PDF Secure nor Al Dia App shows ads.

### Which is updated more often, PDF Secure or Al Dia App?

PDF Secure ships an update every 9 months, and Al Dia App every 2 months. Most recently, PDF Secure was updated on October 24, 2026 and Al Dia App on October 5, 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.*