Step 1 · 30 seconds
Install from the Microsoft Store
One click from the Store. Signed and verified by us. No installer wizards, no admin prompts, no third-party download mirrors to worry about.
Microsoft Store install
Install once. See yourself after a week.
Sarenica tracks focus, fatigue, and posture locally on Windows. After 5 days of normal work, you get your first real Hydrogen report — your patterns, not a generic productivity score.
Microsoft StoreVerified install, signed by us.
Windows 10 & 11Built for desktop work.
Local-firstNo screen capture. No keystroke content.
14-day trialFree to install. No subscription.
Sarenica · Windows
How it works
Install in 30 seconds. See your first report in a week.
No setup wizards, no daily check-ins, no manual logging. Sarenica works quietly while you do real work, then shows you what actually moves your focus.
Step 2 · 5 days
Work normally for a week
Sarenica runs quietly in the background while you do real work. It captures focus, fatigue, posture, and typing rhythm — never screen content, never keystrokes. Just work the way you always do.
Step 3 · Open Hydrogen
See your first weekly report
After a few real workdays, Hydrogen shows you what actually drains and restores your focus — your Hydrogen score, the times of day you hold up best, and the patterns worth changing.
Your own Hydrogen score
Updated daily from your real focus, fatigue, and recovery patterns — not a generic productivity rating.
Posture & fatigue alerts
Quiet nudges grounded in PERCLOS, blink rate, head pose, typing cadence — never screen content.
Weekly + monthly reports
A real artifact you can read in 60 seconds. What changed, why it changed, and what to try next.
Pricing
Free install. 14-day trial. Plus Lifetime is a one-time unlock.
No subscription. No usage limits on the lifetime tier.
Where to go next
After install
Work normally for a few days. Then ask Hydrogen what changed.
01DownloadInstall Sarenica on Windows and start collecting a local baseline.02Baseline ready?Check when your first normal workdays are strong enough to compare.03Reliable minutesSeparate useful coverage from noisy recorded time before trusting results.04Hydrogen comparisonAsk better period-over-period questions once the baseline is usable.
If you get stuck
Short answers before support
The three questions most people ask during install.
Is Sarenica available for Windows?
Yes. Sarenica is built for Windows 10 and Windows 11 desktop tracking.
Is Sarenica available on Microsoft Store?
Yes. Sarenica is distributed through Microsoft Store for a simpler Windows install and update flow.
Is Sarenica free to install?
Yes. The Windows app is free to install and includes a 14-day trial before any Plus Lifetime upgrade.
Ready when you are
See your own focus and fatigue patterns
Install on Windows, work normally for a few days, then come back to Hydrogen.