wooby

Thank you! I spent a lot of time eliminating launch-time work. Most state is precomputed or lazily initialized after first render. I wanted it to feel like a calculator, not an app.

I built GridCalc because spreadsheets on phones feel fundamentally wrong.

On desktop, spreadsheets work because you can see formulas, references, and structure all at once. On mobile, that collapses. You’re constantly panning, zooming, tapping small cells, and losing context.

RPN (Reverse Polish Notation) removes parentheses and operator precedence by using a stack. Instead of writing = (a + b) * c, you enter a b + c *. The order of operations is explicit and linear.

GridCalc combines those ideas: a visible RPN stack with a reference grid.

It’s built for quick, ad-hoc modeling on a phone: loan calculations, position sizing, cash flow scenarios, engineering back-of-napkin math.

It’s not trying to replace Excel. It’s trying to make mobile calculation feel native instead of cramped.

Happy to answer questions about design decisions or implementation.

I built GridCalc because spreadsheets on phones feel fundamentally wrong.

On desktop, spreadsheets work because you can see formulas, references, and structure all at once. On mobile, that collapses. You’re constantly panning, zooming, tapping small cells, and losing context.

RPN (Reverse Polish Notation) removes parentheses and operator precedence by using a stack. Instead of writing = (a + b) * c, you enter a b + c *. The order of operations is explicit and linear.

GridCalc combines those ideas: a visible RPN stack with a reference grid.

It’s built for quick, ad-hoc modeling on a phone: loan calculations, position sizing, cash flow scenarios, engineering back-of-napkin math.

It’s not trying to replace Excel. It’s trying to make mobile calculation feel native instead of cramped.

Happy to answer questions about design decisions or implementation.

The book looks awesome. However, I find some irony in the presence of a “no AI” badge on the back cover considering Lisp was AI research.

Photoprism rocks. I wrote up my experience with it in 2021, and I'm still happily using it: https://tailrecursion.com/~alan/HomePhotos.html

> Realize a successful 51% attack is just the beginning of the war, not the end of it.

I think you're right; the war will go on for awhile. But I'm convinced by https://news.ycombinator.com/item?id=28028542 that in the end, if anything bests fiat, it will be gold.

Barring some new technological breakthrough, it seems to me that bitcoin has no value in a fiat world, and no value proposition in a sound money world. It's a noble dead end.