Developer Tools
Color Truth
See your design the way users actually see it.
ios· Free · all features included ·By All Things AI, Inc
Free. All features included.
No subscription, no in-app purchases, no paid tiers. Everything you see works the moment you install it.
About this app
What Color Truth does
1 in 12 men and 1 in 200 women have color vision deficiency. Most designers find out their button is invisible to red-green colorblind users only after launch. Color Truth is a 3-in-1 accessibility tool that fits in your pocket: **Color-blind image simulator** Load any photo or screenshot. Toggle through eight vision modes (normal, protanopia, protanomaly, deuteranopia, deuteranomaly, tritanopia, tritanomaly, achromatopsia) and see what each user sees. Side-by-side compare. Save the simulated image to share with a teammate. **WCAG contrast checker** Pick two colors. Get the contrast ratio and the WCAG level (AA, AAA, fail) for regular and large text. Suggested adjustments to reach AA. **Palette extractor** Point camera or load a photo. App extracts 8 dominant colors via k-means clustering on-device. Tap any color to get hex, RGB, HSB, and contrast pairs that work. Free. No subscription. All math runs on-device. The simulator uses validated color transformation matrices from published color-vision research.
Features
Built to be useful, not noisy.
Vision simulator
Load image, toggle 8 color-vision modes
Contrast checker
Two-color picker → contrast ratio + WCAG level
Palette extractor
Image → 8 dominant colors via k-means
Side-by-side compare
Original vs simulated split-view
Save & share
Export simulated image to share sheet
Why it exists
The problem
Color-blind simulation tools exist on desktop (Sim Daltonism, Color Oracle) but iOS versions are sparse and most charge subscription. WCAG checkers are web-only or browser extensions. Designers reviewing screenshots on their phone have no native iOS toolkit.
What's different
How Color Truth stands out
Color Truth is the only iOS app combining the three workflows designers actually use — image color-vision simulation, WCAG contrast pair-checking, and on-device palette extraction — using validated transformation matrices and Core Image filters. Free, no subscription. Works on plane / WiFi-less coffee shop.
You might also like
All apps →
Linger
Productivity
Save articles. Listen offline. Always free.
PantryRx
Healthcare
Pantry-first nutrition care, with an outcome guarantee.
Strand
Lifestyle
One second a day. A year in three minutes.
Cancellr
Finance
Find and cancel the subscriptions you forgot you had.
Kitchen
Sports
Pickleball score in one tap
GhostFrame
Photo And Video
Photo-a-day, perfectly stacked
FAQ
Questions about Color Truth
How much does Color Truth cost?▾
Color Truth is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Color Truth store my data?▾
On your device. Color Truth is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Color Truth support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Color Truth?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.