# IDCS Client vs HST Viewer 2

The clearest difference is iOS requirement: IDCS Client at 10.0 against HST Viewer 2's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | IDCS Client | HST Viewer 2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 31 MB | 412 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [CERMATE TECHNOLOGIES INC.](https://appshunter.io/developer/1494065389) | [HUANG SHENG TECHNOLOGY CO., LTD](https://appshunter.io/developer/1699132846) |

## What reviewers say

### IDCS Client

[App page](https://appshunter.io/ios/app/idcs-client/id1494065390)

**Features:** macOS Compatibility

**In-app purchases:** none


### HST Viewer 2

[App page](https://appshunter.io/ios/app/hst-viewer-2/id6752448031)

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

**In-app purchases:** none


## Frequently asked questions

### Is IDCS Client free?

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

### Is HST Viewer 2 free?

HST Viewer 2 is free to download, with no in-app purchases.

### Do IDCS Client or HST Viewer 2 have ads?

Neither IDCS Client nor HST Viewer 2 shows ads.

### Which is updated more often, IDCS Client or HST Viewer 2?

IDCS Client ships an update every 2 months, and HST Viewer 2 every 2 months. Most recently, IDCS Client was updated on November 7, 2026 and HST Viewer 2 on October 12, 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.*