# Security Data vs Shadow SISB

The clearest difference is update cadence: Security Data at every 9 days against Shadow SISB's every 6 months. Shadow SISB's advantage is iOS requirement (13.0 vs 15.0). 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.

Security Data ships an update every 9 days, Shadow SISB every 6 months. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Security Data | Shadow SISB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (55 ratings)](https://appshunter.io/ios/app/security-data/id1571800015/reviews)** | — |
| Number of ratings | **55** | — |
| Positive reviews | 46.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 months |
| Monetization | Free | — |
| Size | 85 MB | 28 MB |
| Requires iOS | 15.0 | **13.0** |
| 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) | [Shadow alarma](https://appshunter.io/developer/1863790793) |

## 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


### Shadow SISB

[App page](https://appshunter.io/ios/app/shadow-sisb/id1587048800)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Security Data free?

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

### Is Shadow SISB free?

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

### Do Security Data or Shadow SISB have ads?

Neither Security Data nor Shadow SISB shows ads.

### Which is updated more often, Security Data or Shadow SISB?

Security Data ships an update every 9 days, and Shadow SISB every 6 months. Most recently, Security Data was updated on September 21, 2026 and Shadow SISB on September 17, 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.*