# Secure Digital Storage vs Gas Detection Assist

The clearest difference is update cadence: Secure Digital Storage at every 2 months against Gas Detection Assist's every 5 months. Secure Digital Storage also leads on iOS requirement (13.0 vs 17.0). 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.

Secure Digital Storage ships an update every 2 months, Gas Detection Assist every 5 months. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Secure Digital Storage | Gas Detection Assist |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 60 MB | 145 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sedisto GmbH](https://appshunter.io/developer/1691044229) | [Draegerwerk AG & Co. KGaA](https://appshunter.io/developer/646307986) |

## What reviewers say

### Secure Digital Storage

[App page](https://appshunter.io/ios/app/secure-digital-storage/id6449939685)

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

**In-app purchases:** none


### Gas Detection Assist

[App page](https://appshunter.io/ios/app/gas-detection-assist/id6471499595)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Secure Digital Storage free?

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

### Is Gas Detection Assist free?

Gas Detection Assist is free to download, with no in-app purchases.

### Do Secure Digital Storage or Gas Detection Assist have ads?

Neither Secure Digital Storage nor Gas Detection Assist shows ads.

### Which is updated more often, Secure Digital Storage or Gas Detection Assist?

Secure Digital Storage ships an update every 2 months, and Gas Detection Assist every 5 months. Most recently, Secure Digital Storage was updated on October 25, 2026 and Gas Detection Assist on October 10, 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.*