What is Sarenica?
Sarenica is a Windows app that tracks fatigue and focus locally, then uses Hydrogen to compare real work pattern changes.
Sarenica starts on your Windows device so the first data you collect is tied to your real work routine.
The app helps you compare one period against another instead of guessing from memory.
Hydrogen works best after a baseline exists, because it can compare actual work-pattern changes.
Why people use it
The app is designed to make fatigue and focus tracking easier to understand without forcing you into a heavy workflow.
Built for desk work, not surveillance
Sarenica is for people who want a private way to track fatigue, focus, and work patterns on Windows. It is not meant to be hidden monitoring software.
Quick answers
Sarenica is a Windows app that tracks fatigue and focus locally, then uses Hydrogen to compare real work pattern changes.
No. Wearables are optional context, not a requirement.
Hydrogen becomes more useful after a few normal workdays of baseline tracking.
Start with the Windows baseline
Create your account, install on Windows, and come back when Hydrogen has enough data to compare real changes.