Comparison

Sim Daltonism vs HDReye

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sim Daltonism

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
Read full description

From the perspective of a color blind person, some colors are impossible to distinguish. Sim Daltonism lets you visualize colors as they are perceived with various types of color blindness. Point your camera at something and let Sim Daltonism show you what it looks like to a color blind person. Use it to improve visual designs by making them more accessible, to understand better strange colors choices on a child’s drawing, or simply to get a better understanding of the world from the perspective of a color blind person. Simulated Vision Sim Daltonism can simulate the vision of many forms of color blindness: Red-Green • Deuteranopia (no green cones) • Deuteranomaly (anomalous green cones) • Protanopia (no red cones) • Protanomaly (anomalous red cones) Blue-Yellow • Tritanopia (no blue cones) • Tritanomaly (anomalous blue cones) All colors • Monochromacy • Partial monochromacy Note that the colors shown are only an approximation. Color blindness varies from person to person and the simulator cannot represent everyone’s vision. Many other factors can affect the results, such as the automatic white point calibration of the camera. Nevertheless, Sim Daltonism is a good tool to better understand color blindness. Sim Daltonism is open source.

About

HDReye

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
Read full description

Finally, an app to shoot 360° HDRis with your phone. HDReye is the first and only iOS app for creating custom 360° HDRi images for realistic 3D lighting and compositing. Just select your desired dynamic range, follow the prompts to shoot a bracketed multi-exposure panorama of your location, and HDReye will stitch and generate a 32-bit (.EXR format) HDRi of your location. HDReye is an essential app for combining 3D animation realistically with footage or capturing lightmaps of any location. What used to require an expensive 360° camera or chrome ball light probe, now can be done conveniently on your phone with HDReye. Whether you are an independent 3D artist, VFX studio, AR developer, NFT artist, content creator, or just a hobbyist - HDReye is here to make your workflow simpler and renders more realistic. HDReye is your image-based lighting solution. Compatible with all 3D packages and render engines including Cinema 4D, Blender, Houdini, Maya, 3D Studio Max, Adobe After Effects, Element 3D, OTOY Octane Render, Redshift, V-ray, Arnold, Unreal Engine, Unity, Spark AR, and more. HDReye users also have access to the largest crowdsourced collection of HDRi images in the world. HDReye also works well for capturing 360° panoramas similar to the Google Street View app. Terms of Use: http://hdreye.app/terms/ Privacy Policy: http://hdreye.app/privacy/

Screenshots

Sim Daltonism4 screens
HDReye4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard7 real differences · 3 level
Sim Daltonism versus HDReye: the parameters behind the verdict, then further details
ParameterSim DaltonismHDReye
PriceFreeFree
Rating4.8 (164 ratings) — better4.5 (771 ratings)
Positive reviews96.4% of reviews — better28.6% of reviews
Number of ratings164771 — better
Update frequencyEvery 10 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size2 MB90 MB
Age rating4+4+
DeveloperMichel FortinHDReye Technologies Inc.

Customer experience

Sim Daltonism

All ratings164 ratings
Positive95.1%
Neutral2.4%
Negative2.4%
Written reviews28 reviews
Positive96.4%
Neutral3.6%
Negative0.0%

HDReye

All ratings771 ratings
Positive88.2%
Neutral2.7%
Negative9.1%
Written reviews189 reviews
Positive28.6%
Neutral5.3%
Negative66.1%

Bugs and requests

Sim Daltonism

Not enough reviews yet to summarise bugs or requests.

HDReye

Reported bugs

3 issues
  • Account deletion issues
  • Stuck on processing/uploading
  • Disappearing credits

Requested features

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

In-app purchases

None

Sim Daltonism

No in-app purchases

4 purchases

HDReye

Subscriptions3
  • HDReye Pro$6.991 Month
  • HDReye Pro3 Days trial$6.991 Month
  • HDReye Pro$39.991 Year
One-time1
  • Asset unlock$2.99

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.

Other comparisons