# PDF Secure vs mssh

The clearest difference is in-app purchases: PDF Secure at none against mssh's 3. PDF Secure also leads on iOS requirement (13.0 vs 18.0). mssh's advantage is update cadence (every 9 days vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. mssh sells 3 one-off in-app purchases. PDF Secure asks for nothing beyond the download.

PDF Secure ships an update every 9 months, mssh every 9 days. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PDF Secure | mssh |
| --- | --- | --- |
| Price | Free | Free |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 1 MB | 10 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iSolid apps](https://appshunter.io/developer/1215383083) | [Jadesada Ponyium](https://appshunter.io/developer/1793593080) |

## 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


### mssh

[App page](https://appshunter.io/ios/app/mssh/id6761432176)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Tip | $0.99 | one-time |
| Lunch Tip | $4.99 | one-time |
| Dinner Tip | $9.99 | one-time |


## Frequently asked questions

### Is PDF Secure free?

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

### Is mssh free?

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

### Do PDF Secure or mssh have ads?

Neither PDF Secure nor mssh shows ads.

### Which is updated more often, PDF Secure or mssh?

PDF Secure ships an update every 9 months, and mssh every 9 days. Most recently, PDF Secure was updated on September 24, 2026 and mssh on September 9, 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.*