# Sim Daltonism vs HDReye

The clearest difference is review sentiment: Sim Daltonism at 96% against HDReye's 29%. Sim Daltonism also leads on in-app purchases (none vs 4) and rating (4.8 vs 4.5). HDReye's advantage is update cadence (monthly vs every 10 months) and ratings volume (771 vs 164). On price, ads and device support there is nothing between them.

Both are free to download. HDReye sells 4 in-app purchases, starting at $6.99 per month. Sim Daltonism asks for nothing beyond the download.

Sim Daltonism holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 164 and 771 respectively. Written reviews point the same way: 96% of Sim Daltonism's written reviews are positive against 29% of HDReye's.

Sim Daltonism ships an update every 10 months, HDReye monthly. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sim Daltonism | HDReye |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (164 ratings)](https://appshunter.io/ios/app/sim-daltonism/id1050503579/reviews)** | [4.5 (771 ratings)](https://appshunter.io/ios/app/hdreye/id1566721813/reviews) |
| Number of ratings | 164 | **771** |
| Positive reviews | **96.4% of reviews** | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 90 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michel Fortin](https://appshunter.io/developer/692938914) | [HDReye Technologies Inc.](https://appshunter.io/developer/1691298419) |

## What reviewers say

### Sim Daltonism

[App page](https://appshunter.io/ios/app/sim-daltonism/id1050503579)

Visualize the world through the eyes of someone with color blindness. This app simulates various types of color vision deficiencies, allowing users to understand color perception differences. It's useful for improving design accessibility and gaining empathy.

**Highlights:** Simulates red-green color blindness, Simulates blue-yellow color blindness, Simulates monochromacy, Real-time camera view, Improves design accessibility, Open source

**In-app purchases:** none


### HDReye

[App page](https://appshunter.io/ios/app/hdreye/id1566721813)

Create custom 360° HDRi images for realistic 3D lighting and compositing directly from your phone. Capture bracketed panoramas and generate 32-bit EXR files for seamless integration with 3D software and AR development.

**Highlights:** Create 360° HDRi images, Shoot bracketed multi-exposure panoramas, Generate 32-bit .EXR files, Realistic 3D lighting and compositing, Image-based lighting solution, Access to crowdsourced HDRi collection

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HDReye Pro | $6.99 | per month |
| HDReye Pro | $6.99 | per month |
| HDReye Pro | $39.99 | per year |
| Asset unlock | $2.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 High-quality stitching
- 💡 Convenient for VFX work
- 🚀 Fast processing
- 👍 Intuitive workflow

**What reviewers complain about**

- 🔒 Paywall to preview/download
- 🐛 Inconsistent stitching quality
- 💰 Expensive subscription model
- 🐛 Crashes and server issues
- 🔒 No offline processing

**Reported bugs**

- Account deletion issues
- Stuck on processing/uploading
- Disappearing credits

**Requested features**

- Free trial or preview option
- Ability to stitch locally on device
- One-time purchase option
- Improved stitching algorithm


## Frequently asked questions

### Is Sim Daltonism free?

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

### Is HDReye free?

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

### Which has better reviews, Sim Daltonism or HDReye?

Sim Daltonism is rated higher. Sim Daltonism averages 4.8 out of 5 from 164 ratings, while HDReye averages 4.5 from 771 ratings.

### Do Sim Daltonism or HDReye have ads?

Neither Sim Daltonism nor HDReye shows ads.

### Which is updated more often, Sim Daltonism or HDReye?

Sim Daltonism ships an update every 10 months, and HDReye monthly. Most recently, Sim Daltonism was updated on October 8, 2026 and HDReye on October 14, 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.*