I found out EMDR apps charge $80/month for a CSS animation. So I built a free one with eye tracking.

The author built Saccada, a free browser-based EMDR eye movement tool after finding existing apps overpriced at $80/month for basic animations. It features 12 patterns—including ancient Indian Drishti Bheda movements—real-time synthesized audio via WebAudio API, webcam eye tracking with MediaPipe, and fully local privacy with zero data collection. Experimental patterns like Sleep REM and Trataka are included, each transparently labeled by evidence level.