“When you are racing against your own biology:
story is just the exhaust
the science is the engine
and our time is the fuel

Gerard Ziemski // halfmarble cofounder & ceo

"The only tools we have to manage our own slice of PD hell."

I am not building for a market. I am building for a race. Whether it's hardware to stabilize a trembling hand or software to track the science behind cellular repair — these are the mechanics of survival.

System // 01 // Hardware

SteadyHandTool

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.

CERN-OHL-S-2.0 (OPEN SOURCE)
HIGH-MASS VIBRATION DAMPENING
BUILT FOR PRECISION PCB WORK
COMING SOON TO CROWD SUPPLY SEE THE HARDWARE
System // 02 // Software

SteadyDoseTracker

Mimicking infusion pump stability using oral medication timing. Half-life math predicts blood concentration curves in real-time — your phone becomes the dosing brain that smooths the peaks and valleys. The Bridge: PK validates what you can feel (ON/OFF states), building trust for the autophagy states you can’t.

BATEMAN PHARMACOKINETIC MODEL
FASTING-AWARE ABSORPTION
REAL-WORLD EVIDENCE CAPTURE
GLASS BOX SOURCE TRACING
PRESENTING AT PATIENTS 2026
SEE THE ENGINE

Autophagy AI

A technical solution for a biological war. This isn’t a lifestyle app; it’s a specialized fasting engine grounded in the latest autophagy research. The science is the engine — we just built the dashboard.

AI-DRIVEN STATE ESTIMATION
NEURO-PROTECTIVE PROTOCOLS
SCIENCE-BASED FASTING ENGINE
SEE THE ENGINE
Join the beta
Open Source
upmonitor (MIT) hm_panelizer (MIT) SteadyHandTool (CERN-OHL-S-2.0)