Report updated Jun 12, 2026
Sim Daltonism
For visual designers, educators, and individuals seeking to understand color blindness or improve accessibility in design.
Sim Daltonism is a market-leading photo & video app that is completely free. With a 4.8/5 rating from 162 reviews, it delivers strong user satisfaction. Users particularly appreciate colorblindness simulation accuracy provides essential utility for designers and developers testing visual accessibility, though camera-only input restriction prevents users from analyzing existing images from their photo library remains a common concern.
What is Sim Daltonism?
Sim Daltonism is a photo and video utility that simulates various forms of color blindness using the device camera.
Users hire the app to verify visual accessibility in design projects and to explain color perception differences to students or children.
Current Momentum
v2.1 · 71mo ago
Zombie- Corrected filter logic for saturated blues.
- Maintains stable, utility-first release cadence.
Active Nemesis
Color Blind Pal
By Vincent Fiorentini
Other Rivals
7-Day Rank Pulse 🇺🇸
Photo & VideoNo ranking data
Rating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
Loading...
What Are The Key Features?
Uses the device camera to overlay color blindness filters on the live viewfinder
Simulates specific vision conditions including Deuteranopia, Protanopia, Tritanopia, and Monochromacy
Publicly available source code hosted on GitHub for community contribution
How much does it cost?
- Free, no paid tiers or IAPs mentioned
The app operates as a free, open-source utility with no monetization mechanisms or gated features.
Who Built It?
Enrichment in progress
Publisher profile available very soon
What other apps does Michel Fortin make?
What do users think recently?
Low confidence · 26 reviews analyzed
How did the latest release land?
What is the recent mood?
Recent user voice shows a thrilled sentiment. Users appreciate colorblindness simulation accuracy provides essential utility for designers and developers testing visual accessibility, but report camera-only input restriction prevents users from analyzing existing images from their photo library.
Limited review volume (26 reviews). Sentiment analysis will deepen as more data lands.
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Sim Daltonism?
Where is it available?
Localized markets (2)
How's The Photo & Video Market?
Market outlook for this category
Available very soon
Which niche is Sim Daltonism in?
to visualize color blindness through camera simulation
Explore the full Accessibility Cameras niche
Every app in this space — 6 tracked, the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(2)
This app is the primary nemesis because it directly targets the same accessibility niche, offering real-time color inspection and filtering tools that compete for the same user base.
Differentiators
- Includes a dedicated color inspector tool for precise identification of specific color values in real-time
- Offers a broader range of color filters to simulate various types of color vision deficiencies
- Maintains a significantly larger user base and review volume, indicating higher market penetration and visibility
Head to head
The target should focus on maintaining its high-quality, lightweight UX while exploring advanced inspection features to prevent feature-parity erosion.
As a first-party Apple utility, Magnifier directly competes by integrating advanced accessibility features like LiDAR-based navigation and scene description that overlap with color-blindness assistance.
Contenders(1)
It competes by providing high-contrast, stabilized visual assistance that helps users with various visual impairments, including color-related challenges.
Same space(5)
While primarily a communication tool, it overlaps with accessibility needs by providing assistive technology for users with visual or cognitive impairments.
Differentiators
- Focuses on text-to-speech and predictive writing rather than visual color simulation for the color blind
- Targets a broader medical and educational market segment rather than specialized color vision accessibility
This app competes in the broader accessibility space by offering high-contrast visual interfaces for users with vision-related challenges.
Differentiators
- Provides a full-system high-contrast interface rather than a specific tool for color blindness simulation
- Includes offline contact processing and voice caller ID features that fall outside the target's scope
This app shares the same 'assistive vision' category, providing live image reading and magnification for users with visual impairments.
Differentiators
- Prioritizes live text extraction and magnification over the color-specific simulation offered by Sim Daltonism
- Operates as a general-purpose medical vision aid rather than a specialized color accessibility tool
This app competes for the same 'Photo & Video' category real estate, though its utility is focused on document creation rather than accessibility.
Differentiators
- Monetizes through professional print fulfillment services, a completely different business model than the target app
- Focuses on guided silhouette overlays for compliance rather than visual accessibility or color simulation
It is a peer in the accessibility utility category, providing essential communication tools for users with sensory limitations.
Compare Sim Daltonism against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for Sim Daltonism
Strengths to defend, gaps to attack
Core Strengths
- Open-source transparency builds high user trust
- Lightweight, focused UX avoids feature bloat
- High simulation accuracy for core profiles
Critical Frictions
- Camera-only input limits professional design workflows
- No image library support
- Lack of advanced color inspection tools
Growth Levers
- Integrate photo library import for static design testing
- Add animal vision modes for broader educational use
Market Threats
- Color Blind Pal's granular inspection tools erode utility
- See Colors' side-by-side comparison captures user attention
What are the next best moves?
Ship photo library import because users cite it as the top friction point for static design testing → increase daily utility.
User sentiment analysis identifies camera-only restriction as the primary complaint theme.
Trade-off: Push the animal-vision filter sprint to Q4 — library import has higher impact on professional design retention.
A counter-intuitive read
The app's lack of monetization is its primary competitive advantage, as it prevents the feature-bloat and ad-clutter that plague rival accessibility tools.
Feature Gaps vs Competitors
- Granular color inspection tools (available in Color Blind Pal)
- Side-by-side comparison views (available in See Colors)
Key Takeaways
Sim Daltonism holds a strong reputation for accuracy, but the camera-only constraint limits its utility for professional designers, so the team should prioritize image import to prevent users from migrating to more feature-complete rivals.
Where Is It Heading?
Stable
The accessibility utility market is consolidating around tools that offer both simulation and precise inspection. Sim Daltonism remains stable due to its high-quality core simulation, but it must expand input capabilities to avoid being relegated to a niche educational tool.
High user satisfaction with simulation accuracy reinforces the app's role as a trusted educational and accessibility tool.
The lack of static image analysis forces professional users to seek alternatives, which creates a churn risk as design workflows evolve.