Building tools I actually use. When I can’t find a good version of something online, I build my own. This is where those tools live – some finished, some still evolving.
The retirement calculator started here before spinning off to its own site.
Others might follow. Consider this the workshop where you can help me kick the tires.
Sauna Calculator How long do you actually need to trigger heat-shock proteins? This tool uses real thermoregulation research to translate your setup – dry sauna, steam room, or hot tub – into a realistic exposure estimate. No mysticism required.
Cold Exposure Calculator Ice bath, cold plunge, or cold shower – how long until you hit CSP, BDNF, and brown fat activation? Built on Søberg Protocol research and actual thermophysiology, not screaming-into-the-void Instagram content.
Can I Retire…Yet? Finally, a retirement calculator that isn’t full of crap. It runs 10,000 Monte Carlo simulations across 99 years of market history, models real taxes, handles RMDs, and tells you – with brutal honesty – whether you can actually retire.
Flow Finder A productivity timer based on how your brain actually works. Four research-backed modes – from 25-minute Pomodoros to 90-minute ultradian deep work sessions – plus custom controls to find your own rhythm. No gamification, no badges, no productivity theater. Just focused work and real breaks.
