Report updated May 14, 2026
Sim Daltonism
For visual designers, educators, and individuals seeking to understand or improve accessibility for color-blind users.
Sim Daltonism is a well-regarded photo & video app that is completely free. With a 4.8/5 rating from 162 reviews, it maintains solid user satisfaction.
What is Sim Daltonism?
Sim Daltonism is a photo and video utility that simulates color blindness via live camera overlays for designers and educators.
Users hire the app to visualize accessibility gaps in designs, serving as a low-cost, open-source diagnostic tool for color-blindness awareness.
Current Momentum
v2.1 · 71mo ago
Zombie- No feature updates since mid-2020.
- Maintained via open-source community contributions.
Active Nemesis
Color Blind Pal
By Vincent Fiorentini
Other Rivals
7-Day Rank Pulse 🇺🇸
Photo & VideoNo ranking data
Rating Pulse 🇺🇸
Recent User MoodAI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
Uses the device camera to overlay color blindness filters on the live viewfinder
Simulates specific vision types including Deuteranopia, Protanopia, Tritanopia, and Monochromacy
Publicly available source code hosted on GitHub for community contribution
How much does it cost?
- Free, no IAP or subscription mentioned
The app operates as a free, open-source utility with no monetization gates or ad-supported inventory.
Who Built It?
Enrichment in progress
Publisher profile available very soon
What other apps does Michel Fortin make?
What do users think recently?
Medium confidence · Latest 100 of 162 total reviews analyzed · Based on 162 reviews. Signal may be noisy.
How did the latest release land?
What is the recent mood?
Recent user voice shows a excited sentiment.
What is the competitive landscape for Sim Daltonism?
How's The Photo & Video Market?
Market outlook for this category
Available very soon
The rivals identified
The Nemesis
Head to Head
The target should focus on maintaining its high-quality, lightweight UX while exploring advanced inspection features to prevent feature-parity erosion.
What sets Sim Daltonism apart
Sim Daltonism offers a more focused, streamlined user experience without the clutter of extra utility features
Higher average user rating suggests superior stability and satisfaction among the core user demographic
What's Color Blind Pal's Edge
Color Blind Pal provides more granular color inspection tools that go beyond simple visual simulation
Larger review count provides stronger social proof and trust signals for new users in the App Store
Peers
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
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
Eye Helper
0Stanislav Svec
This app shares the same 'assistive vision' category, providing live image reading and magnification for users with visual impairments.
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
ClaroCom Pro
★1.0 (1)Claro Software Limited
While primarily a communication tool, it overlaps with accessibility needs by providing assistive technology for users with visual or cognitive impairments.
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
New Kids on the Block
Offers side-by-side comparison views that provide immediate visual feedback for color-blind users
The outtake for Sim Daltonism
Strengths to defend, gaps to attack
Core Strengths
- Open-source codebase facilitates community-led maintenance
- Focused, lightweight UX avoids feature bloat
Critical Frictions
- No feature updates since 2020
- Lacks granular color-value inspection tools
Growth Levers
- Integrate side-by-side comparison views
- Expand documentation for professional design workflows
Market Threats
- Automated inspection tools in Color Blind Pal erode value
- Lack of maintenance risks camera API compatibility
What are the next best moves?
Ship side-by-side comparison view because it is the primary differentiator for new entrants → increase user retention
See Colors newcomer uses side-by-side comparison to provide immediate feedback, which Sim Daltonism lacks.
Trade-off: Pause documentation expansion — feature parity is higher priority for user retention.
A counter-intuitive read
The app's greatest asset is its lack of monetization, as it avoids the ad-clutter that forces professional designers to seek cleaner, paid alternatives.
Feature Gaps vs Competitors
- Granular color inspection tool (available in Color Blind Pal)
- Side-by-side comparison view (available in See Colors)
Key Takeaways
Sim Daltonism holds a niche through its lightweight, open-source design, but the lack of updates since 2020 leaves it vulnerable to automated inspection rivals, so the PM should prioritize feature parity to prevent user churn.
Where Is It Heading?
Stable
The accessibility market is shifting toward automated, AI-driven color inspection, leaving manual simulation tools like Sim Daltonism exposed. Without a roadmap to integrate automated tools, the app will likely transition to a legacy utility status as users migrate to more capable rivals.
The lack of updates since 2020 risks technical debt, which will eventually break camera functionality on newer iOS builds.
Open-source maintenance remains active, ensuring the app survives as a utility despite the absence of a dedicated product roadmap.