Calculadora Científica · iOS

The Letterpress
Calculator

A scientific calculator with every function engraved into a debossed letterpress keypad. Rendered on aged parchment, or deep navy ink.

Download APP STORE iOS 18+
AllScientific
functions
2Editions
light & ink
LogRecall every
result
°/radDegrees or
radians

The FunctionsKeys · Log · Convert

The whole instrument,
on one sheet.

Keys

Every function on the keypad

Trig, logarithms, powers, roots and constants, engraved straight into a brush-painted keypad. No menus.

TrigLogarithms Powers · RootsDeg / Rad
01
El Arquitecto keypad screen
Painted keypad Letterpress keys
El Arquitecto working log screen
Graph backdrop Tap to recall
02
Log

Results stay on the tape

A running tape holds every result. Tap any line to send it straight back into the keypad.

Running tapeTap to reuse Recall any line
Convert

Constants, easy as

π, e, the golden ratio, the speed of light. Plus your own rebar yield and concrete strength, saved for reuse.

ConstantsUnits One-tap insert
03
El Arquitecto constants screen
Cyanotype wash

Light & Ink

Two editions: aged parchment,
and deep navy ink.

Ink Edition

Parchment turns to deep navy ink. The same instrument, after dark.

El Arquitecto keypad — Ink edition

One engine,
both editions.

The math and the muscle memory never change. Only the paper turns to ink.

The Craft

Set by hand.

A complete type and material system, borrowed from drafting rooms, jersey numerals and the letterpress.

Type & MaterialType · numerals · glyphs

0123

Display Numerals · Anton

Big, bold condensed numbers, the kind stitched on a sports jersey. Sized to read at a glance.

Aa·Bb

Typewriter Labels · Special Elite

A worn typewriter face stamps every chip, tag and label.

1.618

Telemetry · JetBrains Mono

Constants, history and metadata run in a precise monospace. Every digit aligns in its column.

Brush Glyphs · Letterpress

Operators are hand-painted; keys are debossed into the sheet.