# Security Data vs M

The clearest difference is review sentiment: Security Data at 46% against M's 0%. Security Data also leads on rating (3.5 vs 1.0) and update cadence (every 9 days vs every 10 months). M's advantage is iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Security Data holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: Security Data has 55 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 46% of Security Data's written reviews are positive against 0% of M's.

Security Data ships an update every 9 days, M every 10 months. The most recent releases landed on September 29, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Security Data | M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (55 ratings)](https://appshunter.io/ios/app/security-data/id1571800015/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/m-viewer/id6449718300/reviews) |
| Number of ratings | **55** | 1 |
| Positive reviews | **46.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 months |
| Monetization | Free | Free |
| Size | 85 MB | 65 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SECURITY DATA SEGURIDAD EN DATOS Y FIRMA DIGITAL S.A.](https://appshunter.io/developer/1571800017) | [M-viewer](https://appshunter.io/developer/1690216067) |

## What reviewers say

### Security Data

[App page](https://appshunter.io/ios/app/security-data/id1571800015)

This app provides a comprehensive solution for managing and electronically signing documents. It allows for secure digital signing and storage, optimizing processes and reducing paper usage. Its modern interface is designed for businesses and professionals needing to validate and manage digital documents efficiently.

**Highlights:** Digital document signing, Electronic document management, Secure digital storage, Modern and intuitive interface, Optimize document processes, Reduce paper usage

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

**In-app purchases:** none


### M

[App page](https://appshunter.io/ios/app/m-viewer/id6449718300)

This application provides live video monitoring with cloud-based recording, saving, and panic alerts. It offers enhanced convenience and security for your surveillance needs.

**Highlights:** Live video monitoring, Video recording, Cloud video saving, Panic alert system, Cloud-based services

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

**In-app purchases:** none


## Frequently asked questions

### Is Security Data free?

Security Data is free to download, with no in-app purchases.

### Is M free?

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

### Which has better reviews, Security Data or M?

Security Data is rated higher. Security Data averages 3.5 out of 5 from 55 ratings, while M averages 1.0 from 1 ratings.

### Do Security Data or M have ads?

Neither Security Data nor M shows ads.

### Which is updated more often, Security Data or M?

Security Data ships an update every 9 days, and M every 10 months. Most recently, Security Data was updated on September 29, 2026 and M on September 28, 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.*