About
Sarenica is a Windows desktop tool that tracks how your fatigue, focus, and work patterns actually change over time — locally, on your machine, without surveillance.
Our vision for desk work
Most knowledge work happens in front of a screen, gets logged as a number of hours, and forgets the shape of the day inside those hours. Sarenica was built to put the shape back — and to make it yours, not someone else's dashboard.
Self-observation should belong to the observer, not the cloud. Everything in Sarenica is shaped by that one decision.
How we build
Privacy policyYour tracking data stays on your machine. Sync is opt-in.
Every Hydrogen answer points at the signals it used. No black box.
Built for the person being measured. Never for their employer.
Garmin, Whoop, and others enrich the analysis only when you connect them.
Built by one person.
Sarenica is the work of Mukul Singh, based in New Delhi, India. Desktop, web, agent backend, infrastructure, and writing — all by hand.
Mukul Singh is the solo founder of Sarenica, a Windows fatigue and focus tracker built around a simple premise: most people remember how a week felt, but not how their work pattern actually changed across it.
He studied BSc Chemistry at Deen Dayal Upadhyaya College, University of Delhi, then started an MBA in International Business at the Delhi School of Economics before dropping out to build Sarenica full-time. The work is technical across the stack — desktop (.NET MAUI), web (Next.js), Firebase functions, and the agent backend on GCP — and Sarenica is built end-to-end by one person.
The idea took shape during an internship at Vocadian, a voice-AI company, where he saw how much hidden context shapes a knowledge worker's day — and how little of it gets captured by hours-logged or task-completed metrics. He has been building Sarenica full-time since late 2024. The local-first architecture is intentional: self-observation should belong to the observer, not the cloud.
The company is registered as an Indian MSME (UDYAM-DL-10-0111368) and runs from New Delhi. He writes the Sarenica blog about what each tracking signal actually measures, ships changes publicly, and reads everything sent to mukul@sarenica.com.
An independent Indian software company.
Registered as MSME UDYAM-DL-10-0111368. Payments processed by Paddle. Windows-first release. No outside funding.
Learn more about what we do
Read the blogAsk questions about your own data. Compare weeks, find drivers, get a daily read.
Focus, fatigue, posture, eye strain — what each desktop signal actually measures.
Daily for tomorrow morning. Weekly for adjustments. Monthly for what to standardize.
How baseline readiness, reliable minutes, and change attribution work under the hood.