Sarenica – Research-grade cognitive fatigue tracker for desktop

Summary: Sarenica is a desktop app that measures cognitive fatigue, focus, and work patterns in real time by tracking typing, mouse, and eye metrics. It processes data locally to preserve privacy and provides daily and weekly insights to help users understand cognitive energy and AI-assisted work effects.

What it does

Sarenica estimates cognitive fatigue using behavioral signals like typing speed variation, scrolling, blink duration, and attention shifts, all processed locally without storing raw data.

Who it's for

It is designed for developers, researchers, and heavy AI users seeking to monitor cognitive energy during work.

Why it matters

It addresses the gap in traditional screen time metrics by providing measurable insights into mental fatigue and attention in AI-assisted workflows.