# Simple Viewer vs Zelmux

Simple Viewer and Zelmux are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Simple Viewer ships an update monthly, Zelmux every 3 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Simple Viewer | Zelmux |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 6 MB | 6 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [STLink](https://appshunter.io/developer/1382605307) | [Yang Zhang](https://appshunter.io/developer/1005259025) |

## What reviewers say

### Simple Viewer

[App page](https://appshunter.io/ios/app/simple-viewer/id6762638850)

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

**In-app purchases:** none


### Zelmux

[App page](https://appshunter.io/ios/app/zelmux/id6768126927)

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

**In-app purchases:** none


## Frequently asked questions

### Is Simple Viewer free?

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

### Is Zelmux free?

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

### Do Simple Viewer or Zelmux have ads?

Neither Simple Viewer nor Zelmux shows ads.

### Which is updated more often, Simple Viewer or Zelmux?

Simple Viewer ships an update monthly, and Zelmux every 3 weeks. Most recently, Simple Viewer was updated on October 3, 2026 and Zelmux on October 8, 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.*