Saccade

Saccade is an iPhone application that enables users to conduct A/B testing on images using real-time eye tracking. Instead of relying on surveys, clicks, or explicit user choices, the app leverages the iPhone's TrueDepth camera and Apple's ARKit to monitor where a user's gaze lingers when presented with pairs of images. The tool is designed to capture unconscious visual preferences, providing instant ranked results that reflect which images attract the most attention.

To use Saccade, users upload between two and twelve images, and the app automatically generates every possible A/B pair for comparison. Each pair is displayed for a few seconds, during which the TrueDepth camera tracks gaze direction. The app then aggregates the results, displaying preference strength bars for each image, and allows users to share a results card with others. Typical use cases include comparing logo or brand variants, selecting the best photos from a shoot, evaluating hero images or thumbnails, testing color palettes, font samples, and even making decisions such as choosing vacation spots or baby names. The app also supports team or client testing by allowing the phone to be passed around, with each session producing independent results.

Saccade emphasizes privacy, requiring no account and ensuring that all processing occurs entirely on the device. No data, photos, or videos are stored or transmitted, and the camera is used solely for real-time gaze detection. The app is compatible with any iPhone model featuring a TrueDepth camera (iPhone X or later) running iOS 17 or newer. There are no ads, subscriptions, or in-app purchases, and the app is free to use with full functionality upon installation.

This tool brings the principles of commercial eye-tracking studies to a mobile device, offering a fast and accessible way to measure visual preference. It is suitable for designers, marketers, teams, or anyone interested in unbiased feedback on visual assets without the need for manual input or traditional surveys.