# Pupil.Size vs Pupil Detection

The clearest difference is ads: Pupil.Size at none against Pupil Detection's shown. Pupil.Size also leads on iOS requirement (11.0 vs 17.7.2). Pupil Detection's advantage is update cadence (every 2 weeks vs every 2 months). On price, 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.Size ships an update every 2 months, Pupil Detection every 2 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Pupil.Size | Pupil Detection |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (4 ratings)](https://appshunter.io/ios/app/pupilsize/id1356860766/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 36 MB |
| Requires iOS | **11.0** | 17.7.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SCALAR CORP.](https://appshunter.io/developer/374875261) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Pupil.Size

[App page](https://appshunter.io/ios/app/pupilsize/id1356860766)

This utility app uses your device's camera to measure pupil diameter in real time. It's designed for quick and easy pupil size analysis.

**Highlights:** Real-time pupil diameter measurement, Uses device camera, Pupil size analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Pupil Detection

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pupil.Size free?

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

### Is Pupil Detection free?

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

### Do Pupil.Size or Pupil Detection have ads?

Pupil Detection shows ads; Pupil.Size does not.

### Which is updated more often, Pupil.Size or Pupil Detection?

Pupil.Size ships an update every 2 months, and Pupil Detection every 2 weeks. Most recently, Pupil.Size was updated on October 7, 2026 and Pupil Detection on October 9, 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.*