Open finance tool
AI Task Exposure Auditor
Map which finance tasks AI absorbs first — and where judgement holds.
Live · free · in your browser
Open the auditor →Tools · Assumptions visible
Tools that show their working.
Free finance tools where every calculator publishes its assumptions — so an answer can be examined, not merely accepted. That’s the whole promise: the working stays visible.
Two are being built now and go live here. Alongside them, GridGo — my library of practical spreadsheet planning templates.
Free · Assumptions visible
Open finance tools.
Each tool keeps its inputs, assumptions, and working on the page — because a result you can inspect is worth more than one you have to trust. Both run right here, in the browser, free.
Open finance tool
FIRE Monte Carlo Simulator
A retirement simulator with every assumption published and every path visible.
Live · free · in your browser
Open the simulator →GridGo · Practical templates
Planning, made practical.
A library of spreadsheet planning templates for work that benefits from structure, clarity, and a model you can open and read. No black boxes — every formula is visible, and the assumptions are yours to change.
Browse GridGo on Etsy →A considered next step