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A/B test images with your eyes using ARKit face tracking

A/B test images with your eyes using ARKit face tracking

by hoag·Mar 24, 2026·3 points·0 comments
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AI Analysis

●●●BangerBig BrainSolve My ProblemDark Horse

ARKit gaze tracking replaces click surveys for unbiased A/B testing on iPhone.

Strengths
  • •Uses TrueDepth camera for gaze tracking without external hardware.
  • •100% on-device processing ensures privacy for sensitive brand testing.
  • •Eliminates survey bias by measuring unconscious gaze duration.
Weaknesses
  • •Limited to iPhone X+ with Face ID, excludes Android and older devices.
  • •Gaze duration doesn't always equal preference (looking longer can mean confusion).
Category
Design
Target Audience

Designers, marketers, product managers testing visual assets

Similar To

UsabilityHub · Tobii Pro · Lookback

Post Description

Saccade uses ARKit face tracking to measure which image you actually look at longer in a side-by-side (well, top-and-bottom as it runs in portrait mode) comparison.

Import a set of images, and it runs every possible pair, tracking your gaze for a dynamically-timed duration each (typically just a fraction of a second). It then ranks the images in descending order of how long your gaze lingered on each. You can then rerun the same batch of images to compound data over multiple tests, or start new. And of course you can easily share your results with friends and colleagues.

Bonus: The Emoji Duel game is pretty fun for onboarding; our 4yo can't get enough of it. :)

100% free, no backend, no user auth, no data leaves your phone. Requires iPhone with Face ID.

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