# UniphoneViewer vs HST Viewer 2

The clearest difference is update cadence: UniphoneViewer at every 3 weeks against HST Viewer 2's every 2 months. UniphoneViewer also leads on iOS requirement (12.0 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.

UniphoneViewer ships an update every 3 weeks, HST Viewer 2 every 2 months. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | UniphoneViewer | HST Viewer 2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 33 MB | 412 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [YANG SHU-CHAO](https://appshunter.io/developer/784264853) | [HUANG SHENG TECHNOLOGY CO., LTD](https://appshunter.io/developer/1699132846) |

## What reviewers say

### UniphoneViewer

[App page](https://appshunter.io/ios/app/uniphoneviewer/id1661490281)

**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 UniphoneViewer free?

UniphoneViewer 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 UniphoneViewer or HST Viewer 2 have ads?

Neither UniphoneViewer nor HST Viewer 2 shows ads.

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

UniphoneViewer ships an update every 3 weeks, and HST Viewer 2 every 2 months. Most recently, UniphoneViewer was updated on October 10, 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.*