Numero — Calc & Units

A modern calculator and unit converter built for iOS 18 — basic, and scientific, plus 14 unit categories and live currency rates from the European Central Bank.

Numero is a fast, focused calculator and unit converter designed for everyday math and one-off conversions. Whether you are balancing a check, evaluating a quick formula, converting recipe units, or comparing currencies before a trip, Numero stays out of your way.

WHAT'S INSIDE

• Three calculator modes - Basic, Scientific (sin, cos, log, ln, sqrt, x^y, factorial, pi, e), and Programmer (binary, octal, decimal, hex with bitwise AND, OR, XOR, NOT, shift-left, shift-right operators).

• 14 unit categories - Length, Mass, Temperature, Time, Speed, Area, Volume, Pressure, Energy, Power, Angle, Frequency, Data, Fuel, plus live Currency.

• Live currency conversion using rates from the European Central Bank via Frankfurter.app, refreshed daily. Includes a bundled cold-start snapshot so your first conversion always works, even offline.

• History synced through your private iCloud - every calculation and conversion appears across all your devices automatically.

• Favorites - pin the conversions you use most for one-tap access.

• Home-screen widgets - see your last result on the home screen and on the Lock Screen, and place a four-tile widget of your favorite converters.

• Siri and Shortcuts - say things like "Convert 100 dollars to euros" or "Calculate 12 times 4" to get an instant answer.

PRIVACY

Numero never tracks you. There are no advertising identifiers, no analytics SDKs, and no third-party trackers of any kind. Your calculation history syncs only through your private iCloud account; we don't have a server.

DESIGN

A purpose-built typography system on top of Apple's Liquid Glass material gives Numero a quiet, considered feel - built natively in SwiftUI with full Dynamic Type, VoiceOver, and Reduce Transparency support.

DISCLOSURE

Currency conversion rates are sourced from the European Central Bank via Frankfurter.app and are updated daily. Numero is not intended for trading or financial decision-making.