# Pupil Detection vs Zelmux

The clearest difference is ads: Zelmux at none against Pupil Detection's shown. On price, update cadence, 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.

Pupil Detection ships an update every 2 weeks, Zelmux every 3 weeks. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Pupil Detection | Zelmux |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 36 MB | 6 MB |
| Requires iOS | 17.7.2 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Yang Zhang](https://appshunter.io/developer/1005259025) |

## What reviewers say

### Pupil Detection

[App page](https://appshunter.io/ios/app/pupil-detection/id6739671823)

**Features:** macOS Compatibility

**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 Pupil Detection free?

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

### Is Zelmux free?

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

### Do Pupil Detection or Zelmux have ads?

Pupil Detection shows ads; Zelmux does not.

### Which is updated more often, Pupil Detection or Zelmux?

Pupil Detection ships an update every 2 weeks, and Zelmux every 3 weeks. Most recently, Pupil Detection was updated on October 9, 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.*