# ShelfDor vs HDS System

The clearest difference is update cadence: HDS System at every 2 months against ShelfDor's every 16 months. 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.

ShelfDor ships an update every 16 months, HDS System every 2 months. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | ShelfDor | HDS System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Size | 21 MB | 34 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Software Design Consulting Group](https://appshunter.io/developer/1301175558) | [Mohamed Salem](https://appshunter.io/developer/1697297413) |

## What reviewers say

### ShelfDor

[App page](https://appshunter.io/ios/app/shelfdor/id1506741343)

**Features:** macOS Compatibility

**In-app purchases:** none


### HDS System

[App page](https://appshunter.io/ios/app/hds-system/id6451339654)

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

**In-app purchases:** none


## Frequently asked questions

### Is ShelfDor free?

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

### Is HDS System free?

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

### Do ShelfDor or HDS System have ads?

Neither ShelfDor nor HDS System shows ads.

### Which is updated more often, ShelfDor or HDS System?

ShelfDor ships an update every 16 months, and HDS System every 2 months. Most recently, ShelfDor was updated on September 8, 2026 and HDS System on September 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.*