# What They See vs Optics Simulator

The clearest difference is price: What They See at Free against Optics Simulator's $1.99. What They See also leads on iOS requirement (18.0 vs 26.4). Optics Simulator's advantage is in-app purchases (none vs 10). On ads and device support there is nothing between them.

What They See is free to download; Optics Simulator costs $1.99 up front. What They See sells 10 one-off in-app purchases. Optics Simulator asks for nothing beyond the download.

## The numbers

| Metric | What They See | Optics Simulator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.3 (36 ratings)](https://appshunter.io/ios/app/what-they-see/id6755517347/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 1 MB |
| Requires iOS | **18.0** | 26.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Special Glasses LLC](https://appshunter.io/developer/1854349802) | [My Call Bag LLC](https://appshunter.io/developer/1243282862) |

## What reviewers say

### What They See

[App page](https://appshunter.io/ios/app/what-they-see/id6755517347)

This app simulates various vision conditions and color blindness in real-time using your device's camera. Explore how different visual impairments and animal vision affect perception, with educational guides and sharing capabilities.

**Highlights:** Real-time vision condition simulation, Colorblindness simulation, Animal vision simulation, Dyslexia text transformation, In-depth educational guides, Photo and video capture with simulation, Sharing capabilities

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Astigmatism | $1.99 | one-time |
| Cataracts | $1.99 | one-time |
| Protanopia | $1.99 | one-time |
| Tritanopia | $1.99 | one-time |
| Baby Vision | $2.99 | one-time |
| All Color Blindness | $3.99 | one-time |
| All Vision Impairments | $4.99 | one-time |
| All Dyslexia Simulations | $4.99 | one-time |
| All Animal Vision | $7.99 | one-time |
| Unlock Everything | $14.99 | one-time |


### Optics Simulator

[App page](https://appshunter.io/ios/app/optics-simulator-ray-diagram/id6773525708)

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

**In-app purchases:** none


## Frequently asked questions

### Is What They See free?

What They See is free to download, with in-app purchases available.

### Is Optics Simulator free?

Optics Simulator costs $1.99, with no in-app purchases.

### Do What They See or Optics Simulator have ads?

Neither What They See nor Optics Simulator shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*