1 / 4
Click to expand
Windows Apps

Calculator Fun

100% Free

Free

All-in-one Windows calculator and learning tool: scientific math, unit converter, history, themes, and built-in mini-games—fast, offline, and keyboard-friendly. Ideal for students, homework, and daily number work.

Use the buttons above to download files or open links (each opens in a new tab when needed).

Details

Features

Features

  • Scientific calculator with memory and advanced math functions.
  • Multi-category converter: currency, length, volume, mass, temperature, and more.
  • Calculation history for quick review and reuse.
  • Built-in mini-games for logic and mental math practice.
  • Theme switch, angle mode, decimal precision, and keyboard input support.

Compatibility

System requirements

End users (installer):

  • Windows 10 or Windows 11
  • Download and run Calculator_Fun_Setup.exe from the button on this page
  • The installer registers uninstall, Start menu, and optional desktop shortcut

Get the source (GitHub):

  • Clone github.com/moeezshakir/Calculator_fun_Sciter_js or use Get it on GitHub on this page
  • Open Calculator_fun.sln in Visual Studio 2026 Insider (platform toolset v145)
  • If you use an older Visual Studio, right-click the project → Properties → General → Platform Toolset and retarget to v143 (or the toolset you have installed)

Build the solution:

  1. Choose Debug or Release and x64 or Win32 from the Visual Studio toolbar
  2. Build → Build Solution (all four combinations are supported)
  3. Output goes to Bin\<Platform>\<Configuration>\ (for example Bin\x64\Release\Calculator_fun.exe)

Sciter runtime (required):

  • This project uses Sciter 6.0.3.10 (see Sciter_SDK/include/sciter-version.h)
  • Copy sciter.dll from the Sciter_SDK folder into the same Bin folder as Calculator_fun.exe — the app will not run without it
  • If you switch Sciter versions, replace sciter.dll and the Sciter_SDK/include headers with the matching SDK, then Clean Solution and Rebuild
  • Different Sciter versions can change styles or behavior — adjust UI/CSS/JS as needed for your target version
  • More on Sciter JS: sciter.com

Build the setup installer (Inno Setup):

  1. Build Release | x64 first and confirm Bin\x64\Release\ contains both Calculator_fun.exe and sciter.dll
  2. Open Calculator_Fun_Setup\Calculator_Fun_Setup.iss in Inno Setup and compile — default output is Calculator_Fun_Setup.exe (x64)
  3. To target Win32 or another configuration, edit MyBuildDir in the .iss file to match your Bin path

Saved settings:

Theme (light/dark), angle mode (deg/rad), decimal places, and hint visibility are saved to %AppData%\Calculator_fun\cal_fun.txt. Currency rates are cached in %AppData%\Calculator_fun\currency_rates.json.

Overview

Full description

Calculator_Fun is a full-featured desktop productivity and learning application built on Sciter with a native C++ host and a modern HTML/CSS/JavaScript interface. It is designed to go beyond a traditional calculator by combining multiple tools and interactive modules into one lightweight Windows app. At its core, it offers a scientific calculator with robust arithmetic handling, memory operations, percentage/sign controls, power and root functions, logarithmic and trigonometric functions, factorial support, expression-aware evaluation, keyboard input handling, and configurable decimal precision. The app also includes a comprehensive unit converter covering practical categories such as currency, length, volume, weight/mass, temperature, energy, area, speed, time, power, data, pressure, and angle, allowing users to switch categories and units quickly from the same interface. To improve continuity and usability, calculation history is maintained and rendered in a dedicated tab so users can review recent operations without losing workflow context.

In addition to utility-focused features, Calculator_Fun includes a rich collection of mini-games that make the app engaging for students and casual users: Guess Number, Rock-Paper-Scissors, Quick Math, Dice Roll, Tic-Tac-Toe, Higher/Lower, Prime or Not, Math Race, Sequence Challenge, Memory Challenge, and a 21-style card game. These modules help reinforce number sense, mental math speed, and logic while keeping the experience interactive. The settings tab provides practical customization controls including light/dark theme toggle, angle mode (degrees/radians), decimal-place preferences, and hint visibility, plus integrated uninstall access for convenience. Distribution is handled through Inno Setup (Calculator_Fun_Setup), with proper install/uninstall registration and desktop/start-menu shortcuts for a standard end-user setup flow. Overall, Calculator_Fun is positioned as an all-in-one desktop math companion that balances serious calculation features with educational and entertainment value in a clean, responsive interface.