Aster is a free, offline Windows calculator for everyday arithmetic, scientific expressions, programmer calculations, unit conversions and date arithmetic.

It includes five modes: Standard, Scientific, Programmer, Converter and Dates. Features include searchable local history, reusable results, decimal memory, keyboard shortcuts, and light, dark and system themes.

Calculations run locally without an account, payment or activation key. Aster is built with C# and Windows Forms on .NET 10.

The portable Windows x64 package requires the .NET 10 Desktop Runtime. Extract the complete application ZIP and run Aster.exe.

Features

  • Standard, Scientific, Programmer, Converter and Dates modes
  • Local history, reusable results, keyboard shortcuts and light/dark themes

Project Samples

Project Activity

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License

MIT License

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Additional Project Details

Operating Systems

Windows

Languages

English

Intended Audience

End Users/Desktop

User Interface

.NET/Mono

Programming Language

C#

Related Categories

C# Calculators, C# Financial Calculators, C# Date Calculators

Registered

2026-10-31