Gerard Ziemski // halfmarble cofounder // bioenergetics os architect
I am not building for a market. I am building for a race. Whether it is hardware to stabilize a trembling hand or software to track the science behind cellular repair — these are the mechanics of survival.
A high-stability SMD soldering aid designed to dampen tremors. Born from the need to keep tinkering when biology tries to stop it. Open-source because community is the only way forward.
Ten chipless passive rings, one per finger. Two wrist-worn hubs designed to excite them with passive RF telemetry and fuse the returned digit kinematics with continuous autonomic biometrics (single-lead ECG, PPG, skin temperature); an ankle hub for gait and freezing-of-gait. The Steady tools intervene — UnSteadyRing observes. Intended as the continuous, contextualized reference layer for everything else — sensing hardware is in early R&D (design stage).
A pharmacokinetic visualizer that models the blood concentration curves of the medication schedule your doctor prescribed. Half-life math shows how your levels rise and fall in real-time — not to tell you what to take, but to help you and your clinician see what is already happening. The Bridge: PK helps illustrate what you can feel (ON/OFF states), building trust for the autophagy states you cannot.
A technical solution for a biological war. This is not a lifestyle app; it is a specialized fasting engine grounded in the latest autophagy research. The science is the engine — we just built the dashboard.
A specialized metabolic intake engine designed around the Therapeutic Carbohydrate Restriction (TCR) guidelines championed by the Public Health Collaboration UK. This is not a diet app. It will be a macro-nutrient tracker that lets you log carbohydrate and protein timing relative to your levodopa doses and track your own nutritional ketosis, following TCR guidance.
Your heart rate, read aloud. SteadyHeartBeat speaks your live heart rate from AirPods Pro 3 — no watch, no chest strap, no screen. Everything runs on-device; your data never leaves the iPhone. Source and prior art are public now; a free public beta is available on request, with the App Store release to follow.
Harvard Medical School / Beth Israel Deaconess Medical Center // Boston
halfmarble is officially registered for the DCI Network's Patients 2026 Conference in Boston. We are bringing our "Glass Box" architecture to the clinical informatics community to demonstrate how patient-engineered PK visualizations can safely capture the "Messy Middle" of Real-World Evidence (RWE) that researchers need, with zero AI drift.
halfmarble was not built by a health tech company. It was built by a patient and a nurse — because the tools we needed did not exist. We are coming to Patients 2026 to find out if the clinical community wants what we have built.
Every field we capture. Every transformation we apply. Every "we will never." Documented, public, plain language.
SEE EXACTLY WHAT GETS SHARED →Steward, not owner — of data, and of ideas. The methods we want anyone to be free to use, we publish as dated, public-domain prior art, so no one can fence them off later. The core sensing platform, we protect by filing.
Defensive publications in the Technical Disclosure Commons, an examiner-searched prior-art database. Dated, public-domain, and freely practicable by anyone.
The UnSteadyRing wearable sensing platform — passive finger nodes read by wrist-worn hubs — is protected by seventeen provisional patent applications filed with the USPTO in 2026, covering fine-motor and bioenergetic sensing across the hand, limbs, head, and ground interface.
The Un prefix is intentional — UnSteadyRing observes; it does not intervene.
"My wife and I are building this because I have Parkinson's Disease. halfmarble is not a startup. It is a fight."
A nurse and a programmer. We built this. Just us.
halfmarble donates 5% of net profits to the organizations whose research our tools stand on. Not charity in the abstract — reinvestment in the intellectual commons we depend on.
Annual donations published. Committed. Non-negotiable.
Bachelor of Science, Honors Computer Science degree from Western University in 1998, plus two years toward an M.Sc. — dropped out to join Apple. Twenty-five years writing software. New Media Lab. Apple. Sun Microsystems. Oracle. Two patents along the way. Early open source contributor to gl4java and jogl — Java bindings for OpenGL — back when Java on the desktop still felt like the future.
Diagnosed with Parkinson's Disease over 10 years ago. halfmarble is the engine I built out of necessity — to live and work with it, and to help others who do too.
Born in Poland. Educated in Canada. Cut my teeth in Silicon Valley. Now building halfmarble from Charlottesville, Virginia.
Off the clock: hiking, kayaking, books and games, tinkering with microcontrollers, and love for the company of dogs.
Nursing education and training in the United States. Fourteen years as a nurse. Most of them caring for geriatric patients — the population hit hardest by chronic disease, medication complexity, and the day-to-day reality of living with conditions that do not get better. Known to my employer and co-workers as a fierce patient advocate.
Born and raised in Ukraine. Volunteer as an English-to-Russian interpreter for immigration cases. Now building halfmarble from Charlottesville, Virginia.
Off the clock: cooking healthy meals for my family, hiking, and kayaking.