Notepad-style input
Type expressions naturally, one per line. No buttons, no UI clutter. Just you and math.
Variables
Assign values with name = value and reference them anywhere below. Like a spreadsheet, but simpler.
Syntax highlighting
Variables, numbers, and operators are color-coded. Reassignment warnings keep you safe.
Multiple boards
Organize calculations into separate boards. Switch between them instantly with tabs.
Search everything
Find any board or expression across your entire workspace with Cmd+K.
Private by default
Everything stays in your browser. No accounts, no servers, no tracking. Your data is yours.