Themes

The calculator includes five visual themes that change colours, fonts, and visual effects across the interface, while leaving functionality unchanged.

Switching themes

1. Open the drawer menu (click or tap ☰ in the top-left).
2. Tap Settings.
3. Scroll to the Theme card.
4. Select any theme. Changes apply immediately.

Your selected theme is saved and will be restored when you return.

Midnight Executive (default)

The default theme. A dark, professional look with a warm amber accent that feels like an executive dashboard and is comfortable in low light, especially on OLED screens.

Graphite Professional

A clean, technical theme with a crisp cyan accent and a focused, developer-tool feel for people who like minimal, no-frills interfaces.

Retro

A glowing green CRT-style theme with scanline and chunky button effects that leans hard into vintage terminal and Pip-Boy nostalgia.

Glassmorphism

A modern frosted-glass theme with a soft purple gradient that feels sleek and contemporary, like a polished iOS home screen.

TI-83

A classic grey body with a green LCD-style display that mimics a real TI-83, perfect if you grew up on graphing calculators in math or engineering classes.

Which theme should I choose?

There is no wrong answer - theme choice is entirely personal preference. guidelines:

If you want…	Choose…
A professional, dark default	Midnight Executive
A clean, technical look	Graphite Professional
Something fun and nostalgic	Retro or TI-83
A modern, trendy aesthetic	Glassmorphism
Maximum battery saving (OLED)	Midnight Executive (darkest)

You can switch at any time, so try them all.