iOS · Calculator

Coast Calc for iPhone and iPad

A calculator worth looking at.

Coming soon to the App Store

Six complete design systems ship in the app. Pick one and every screen wears it — keys, type, spacing and finish, all redrawn.

Type the whole line — 25% × 975 × 8 — and it solves it with proper precedence and parentheses, instead of running a total as you go. The math uses exact decimals, so 0.1 + 0.2 is 0.3, not 0.30000000000000004.

Coming soon

Universal — one purchase covers iPhone and iPad. A one-time payment, not a subscription. No network connections, no account, no ads.

On your phone.

Six design systems, every screen redrawn

ROOK — a phosphor terminal with scanlines and glow

Eleven ROOK screens, from Nostromo green to paper white

Scientific — trig, logs, powers, roots, factorials

The large widget is the full pad, computing on the Home Screen

Convert length, weight, temperature, volume, area, speed, data and time

Percentages, worked the way you'd say them

Six design systems

NULL

Dot-matrix numerals on graph paper, one red accent.

ROOK

A phosphor terminal. Scanlines, screen glow, and eleven screens to pick from: Nostromo green, amber monochrome, cryo-bay teal, paper white and more.

LUMEN

Frosted glass, ten accent colors.

PANEL

Machined hardware around an inset display.

MIN

Flat and quiet. It gets out of the way.

RETRO

Cream keycaps on walnut, straight out of the seventies.

A real calculator

Type the whole line and it solves it with proper precedence and parentheses, instead of running a total as you go

The math uses exact decimals, so 0.1 + 0.2 is 0.3, not 0.30000000000000004

Every result goes on a tape that keeps your last two hundred

Tap any line to bring it back

Six calculators in one

Basic, for the everyday

Scientific, with trig, logs, powers, roots, factorials, and degrees or radians

A converter for length, weight, temperature, volume, area, speed, data and time

Tip and split

Percentages

Days between dates

A widget that actually works

The large Home Screen widget is the full pad — all twenty keys

Medium has eighteen; small shows your last result

Every key computes right there on the Home Screen — the app never opens

Long-press to choose which theme it wears

Built for iPad too

Not a stretched-up phone app — the iPad layout is its own, in both orientations

One purchase covers both devices

Nothing leaves your device

Coast Calc makes no network connections at all

No account, no analytics, no ads, no subscription

Your calculations, history and settings stay where you made them

Pay once. Keep it.