Data‑driven decisions for
money, engineering,
travel, and life.
I write about the decisions I've actually had to make — then build the calculator I wished I'd had while making them. A few of those calculators grew into full products. Everything lives here.
Built by one engineer — not a growth team
02 Production applications
From spreadsheet to ship.
Every application below started as a personal spreadsheet. When the tabs multiplied past reason, I built the real thing.
Apex
LiveFIRE planning with Monte Carlo simulations, eight retirement strategies, and geographic arbitrage math.
v0 a retirement workbook → now full planning platform
RealInvestorX
LiveInstitutional-grade rental analysis: 40+ metrics, valuation modeling, and an assistant that reads the deal with you.
v0 a 40-tab deal workbook → now analysis engine
NERC Compliance OS
LiveCompliance tracking for the power grid: 87 NERC standards, 1,500+ requirements, assisted evidence mapping.
v0 a compliance matrix in Excel → now an operating system
03 Free tools / index
For the questions I kept googling.
No signup · runs in your browser · $0.00
04 Field notes / journal
Notes from the field.
Travel stories, money deep-dives, and whatever I'm currently overthinking.
05 Workshop notes / newsletter
When I actually have something to say.
What I'm building, what broke, and what it cost. I skip months when I've got nothing useful — that's the quality bar.
Writer · builder · traveler.
I'm Rockeish — an electrical engineer who manages energy projects by day and builds this by night. The products worth using almost always come from someone who got stuck on the problem first.
Read the full story- Whoone engineer, no staff
- Since2018
- Stackwhatever ships
- Updated2026-06-21