Every visualization Instacalc draws — each from a one-line function call over plain data.

A tour of the input controls — plus the new **action buttons** that set values (even a field inside an object) in one tap. Change anything; the readouts update live, and the whole state stays in the URL — nothing is hidden, so it's all shareable and undoable.

A pattern for big data tables: load a shared base (a Google Sheet, a hosted JSON), then layer **your own** edits and rows on top — without ever touching the source. Add rows by tapping a button or editing the table. Everything stays in the URL, so your layer is shareable and undoable.