I build software you own. No subscriptions. No accounts. An App Store app that hit #23 paid in Productivity, a Davis-Bacon wage tool for contractors, an algorithmic weather trading bot on Kalshi, three games for iPhone Duo, and signed Mac apps you can download today. Tools that are fast, accurate, local, and most importantly: yours.
I'm currently building the operating system for Doctor Asphalt, a Midwest paving company where I serve as Director of Technology. Paving still runs on clipboards, whiteboards, crumpled receipts, and software built for somebody else's industry. So I'm writing our own. One system covers the whole business: bidding, scheduling, field operations, fleet, safety, invoicing, and job costing. The office, the shop, and the crews all work from the same numbers.
For iPhone Duo
- Knotty Navy the classic sea battle with wooden toy boats. shut the phone to pass it, and the cover screen becomes the lid. free on the App Store.
- DuoBox an accordion. fold the phone to work the bellows. free on the App Store.
- Shut the Fold shut the box, the old pub dice game. shut the phone to pick up the dice, shake it, open it to roll. free on the App Store.
Shipped
- DAi the operating system behind Doctor Asphalt. I lead it and write most of it, working with the owner, the office, and the crews who run on it. not public.
- PipeBook pipefitter reference + field calculators for iOS. 1,300+ dimension values, each verified against two sources. peaked #23 paid in Productivity on the App Store.
- WagePin Davis-Bacon prevailing wage lookups that read like a printed schedule. pins the revision that applied at bid time.
- The Red Putter the site of a 1974 mini golf course in Door County, Wisconsin. built as a gift for the family that runs it, made official the day they saw it. no cookies, no tracking, no accounts.
Open source
- TimeTurner a menu bar hourglass drawn in keyboard characters. real falling sand drains it over the clock hour, it flips itself at :00, and pomodoro runs on the clock grid with no start button. download
- Redline a floating vitals pill for apple silicon macs. cpu, gpu, memory, die temp, and a warning when the machine starts throttling. hover over the pill or menu bar icon to see which apps are eating your ram. download
- Musical Typing the ⌘K piano on this page, pulled out into a drop-in script. web audio, four patches, zero dependencies.
- Quant-toolkit a Claude plugin for prediction-market trading, distilled from GEO's live run: kelly sizing, calibration audits, a backtest harness, maker pricing.
- Digits MIT-licensed MCP server connecting Claude to Apple Numbers. zero dependencies.
Garage
- Where's Fly-do? I wired a fruit fly brain from the map Janelia, Google, and Cambridge published in 2026, and taught it to find the striped guy with sugar and zaps. see if you can find him before it does. play
- GEO algorithmic trading bot on Kalshi weather markets. six-model ensemble, quarter-Kelly sizing, 600+ tests. live demo dashboard.
- O.C. and the Fifth Sun a top-down Aztec-myth action game in Godot 4. passion project and an eternal work in progress.
- Gengar Edition an Emerald ROM hack. Gastly as a starter, Gengar without trading, wild legendaries, and other QoL improvements.