Perceptrail: A11y Audit

Perceptrail is a pocket workbench for verifying the accessibility basics that get apps and websites flagged: color contrast, touch target size, and reading order. Everything lives on one fast screen. Type any foreground and background color as hex codes and Perceptrail computes the WCAG contrast ratio live, with a clear Passes AA or Fails AA verdict. Flip the large-text toggle and the threshold adjusts correctly from 4.5:1 to 3:1. Below that, the touch target probe lets you drag width and height sliders to test any control size against the 44-point minimum. A severity chart and a reading-order panel round out the screen with worked examples: findings ranked advisory, serious, and critical, and a side-by-side of visual order versus VoiceOver order with mismatches counted. FEATURES • Live WCAG contrast ratio from any hex color pair • Passes/Fails AA verdict with the correct large-text threshold • Touch target probe against the 44 x 44 pt minimum • Severity chart of example findings, from advisory to critical • Reading-order comparison: visual sequence vs VoiceOver sequence • Instant results — no setup, no configuration PREMIUM BY DESIGN One-time paid download. No account. No ads. No analytics. No tracking of any kind. Perceptrail works entirely offline — every calculation happens on your device.