# Optical Simulator vs EyeScaler

The clearest difference is in-app purchases: Optical Simulator at none against EyeScaler's 1. Optical Simulator also leads on iOS requirement (11.0 vs 15.0). EyeScaler's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. EyeScaler sells 1 one-off in-app purchase. Optical Simulator asks for nothing beyond the download.

Optical Simulator ships an update every 4 months, EyeScaler fortnightly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Optical Simulator | EyeScaler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/eyescaler/id6754126877/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 82 MB | 4 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Treeview Studio SAS](https://appshunter.io/developer/1171912639) | [建芳 马](https://appshunter.io/developer/1809381883) |

## What reviewers say

### Optical Simulator

[App page](https://appshunter.io/ios/app/optical-simulator/id1536399422)

**Features:** macOS Compatibility

**In-app purchases:** none


### EyeScaler

[App page](https://appshunter.io/ios/app/eyescaler/id6754126877)

This utility app uses your phone's camera to accurately measure your pupillary distance for glasses. It provides both distance and reading measurements, offers insights into your results, and suggests frame sizes. Keep a history of your scans for easy access.

**Highlights:** Smart PD Scan, Far & Near PD Support, Frame Fit Tips, History Records, No Tools Needed

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EyeScale Lifetime PRO | $2.99 | one-time |


## Frequently asked questions

### Is Optical Simulator free?

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

### Is EyeScaler free?

EyeScaler is free to download, with in-app purchases available.

### Do Optical Simulator or EyeScaler have ads?

Neither Optical Simulator nor EyeScaler shows ads.

### Which is updated more often, Optical Simulator or EyeScaler?

Optical Simulator ships an update every 4 months, and EyeScaler fortnightly. Most recently, Optical Simulator was updated on November 7, 2026 and EyeScaler on October 30, 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.*