digit

About

digit is a notepad that does math.

Write ordinary text and calculations in the same note. Any line that is
math gets its result inline, instantly, as you type — everything else is
just text.

•  Variables: rate = 1.07, then use rate anywhere below
•  Equation solving: a^2-4a+4=0 → (a, 2, 2); works numerically for
   sin(x)=0.5 style equations too
•  Functions and constants: sqrt, sin, log, gcd, mean, pi, e, phi, ...
•  last refers to the previous result; # starts a comment
•  Global variables shared across notes, with a per-note opt-out
•  Multiple notes, switchable from the toolbar popup

Fast and private by design:

•  100% offline — no network requests, ever
•  No background processes — nothing runs unless the popup is open
•  Only permission: storage (your notes, saved locally on your device)
•  Rust math engine compiled to WebAssembly (~170 KB)

Your notes never leave your machine.