Tools · Web · PWA

CALC BOY

Retro calculator, converter and PWA.

View on GitHub ↗Start web app ↗Technical details →

What it does

CALC BOY is an offline-capable calculator PWA in a classic console style. It combines everyday arithmetic with scientific, programmer, conversion and finance tools, and also includes formula helpers, function plots and small games. The same app can run in a browser or be installed to a phone’s home screen.

AI-assisted development

Schrotty74 develops these projects with AI assistance. Depending on the project, OpenAI Codex and, in parts, Claude support the development work. Xcode is used for Apple-platform development. Schrotty74 retains final review and responsibility.

Complete feature list

01Basic and scientific calculator with trigonometry, logs, powers and memory

02Unit conversion, VAT helpers, savings and interest calculations

03Programmer mode with HEX, BIN, OCT, bitwise operations and RPN stack

04Formula assistant, pixel-style function plots, calculation history and exports

05Seven unlockable console themes, optional 8-bit sounds, Math Attack and Snake

06Calculator history stored on the device

07Installable on a phone home screen

08Offline operation through the service worker

09Reduced-motion support

10English and German interface

Manual & downloads

Open English manual ↗

Latest final release · v3.1.0

Download macOS ZIP ↗

Data and privacy

Settings and history are stored only in the browser’s localStorage. The app makes no external requests, uses no analytics and caches only its own files for offline use.

Descriptions, technical details, downloads and manuals reflect the public repository. External links open only when you select them. Displayed screenshots use the demo or fictional data documented there.