Lamina ✦ is a Windows 11 native WinUI 3 calculator application that is Elevated with Powerful Scripted Actions. This utility combines a modern, clean interface with the ability to perform complex calculations across Mensuration, Finance, and Unit Conversions, making it significantly more powerful than standard calculators.

Target OS: Windows 11 ONLY. | Latest Stable Version: v11.26100.13.0

App Execution Aliases : lamina.exe & lmna.exe

Note

Lamina ✦ uses Project Trust My Msix! for Installing the .msix using an Inno Setup Installer Wrapper to Inject its certificate to Trusted Root Certification Authourities Store. A copy is given in Releases for Usage.

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PLANS for v11.26100.14.0 & 11.26100.15.0! :

• A Simple Scientific Calculator Addon in Main UI

• New Scripted Actions Design (WIP)

Please note that certain buttons here such as "Copy" will exist as icons.

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Key Features :

• Simple and Clean GUI. ✅
• Dozens of calculation options. ✅
• Fast and Error-Proof Calculations. ✅
• High Precision for decimals. ✅
• Modern UI with Fluid Animations and Transitions. ✅
• History Support for the Base Calculator UI. ✅
• Theme switching built in. ✅
• Backdrop switching built in. [ B/w Mica Alt and Acrylic ] ✅
• Available in both Msix & Installer Variants. ✅

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Install Lamina ✦ from Winget :

  winget install Lamina.unp

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Video Previews :

• New Onboarding Experience and Reveamped Settings Menu!!!!

2026-03-27.20-54-06.mp4

• Scripted Actions Preview [ TO BE UPDATED IN NEXT RELEASE ] :

Screen.Recording.2025-05-10.234108.mp4

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Scripted Actions :

Note

A Scientific Calculator will be added onto the Main Calculator UI.

These Scripted Actions Will be Redesigned in v11.26100.15.0!

• Base Calculator UI + Scientific Calculator.
• Date Calculator
• Programming
• Convertors :
  • Unit Convertor
  • Currency Convertor
• Mensuration :
  • Heron's Formula
  • Perimeter Calculator
    • Equilateral Triangle
    • Isosceles Triangle
    • Square / Rhombus
    • Rectangle / Parallelogram
    • Circle
    • Semi-circle
  • Area Calculator
    • Equilateral Triangle
    • Isosceles Triangle
    • Standard Triangle
    • Square
    • Rectangle / Parallelogram
    • Rhombus
    • Circle
    • Semi-circle
    • Room
  • Volume Calculator
    • Cube
    • Cuboid
    • Cylinder
    • Cone
    • Sphere
  • Total Surface Area
    • Cube
    • Cuboid
    • Cylinder
    • Cone
    • Sphere
  • Curved Surface Area
    • Cylinder
    • Cone
    • Sphere
  • Diagonal Calculator
    • Square
    • Rectangle
    • Cube
    • Cuboid
• Algebra :
  • Quadratic Equation Solver
• Finance :
  • Financial Calculator
    • Simple Interest
    • Compund Interest

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Installation :

1. Download the .msix and .cer files from the latest release.

2. Import the .cer file to the Trusted Root Certificates Store. ( First Run ONLY! )

   Alternatively use this Command after Downloading TMM.exe from Releases :

    .\tmm --i <Certificate>
   

3. Install the .msix file.

--------------------- OR ---------------------

• Download the Setup.exe that does the Importing and Installation FOR YOU!

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Building from Source :

• Install Visual Studio 2026 with WinUI Application Development and .NET Desktop Development workloads.
  • Windows 11.
  • XAML Styler is recommended for contributing.
  • .NET 10.0 Runtime LTS is must.
  • Get the latest Windows 11 SDK [26100.xxxx].
  • Community Edition is sufficient for contributing and testing. Pro and Enterprise Editions can also be used.
  • Github Copilot and Live Share can be skipped for Storage Saving.

• Get the Code :

  git clone https://github.com/Chill-Astro/Lamina-Calculator.git
  

• Open Lamina.sln in Visual Studio.

• Hit Deploy as shown in Screenshot. ( Building is Automatically Done while Deploying ).

Lamina ✦ is now Deployed and now it shall appear in the Start Menu. Enjoy! :)

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Adding Currency Convertor :

Lamina ✦ uses ExchangeRate-API for Currency conversion. An API key must be manually added in the region indicated.

• Add appsettings.json under Lamina/ : Paste the Code into here.

    {
      "LocalSettingsOptions": {
        "ApplicationDataFolder": "Calculator/ApplicationData",
        "LocalSettingsFile": "LocalSettings.json"
      },
      "CurrencyApiKey": "Enter API Key Here"
    }
  

• Buid and Run the Application as shown above.

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Icon Sources and Credits :

• Icons8 : For all the Mensuration and Quadratic Equation Solver Menu Logos,
• SVG REPO : For Calculator Menu Logo, Unit Convertor, Heron's Formula, and most of the icons.
• Icomoon : For the Base Calculator Icon and Produce the .ttf file for the Icons.
• Inno Setup by JRSoftware : Literally the Installer is possible THANKS to them!
• Microsoft Calculator : For Square Root and Cube Root Button Icons. Also this inspired me to make this app.
• ExchangeRate-API : For Currency Conversion. ( Free Plan, so Currency Conversion is Limited! -_- )
• @Lisa on Pexels : For Wallpaper for Promo Art.

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HALL OF FAME 👍 :

// Will add Forked Repos which are genuinely good. 🤩 I will list everything Good about them.

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HALL OF NEUTRALITY 😐 :

// Will add Inactive Forks. Uh yeah that's it atleast it's Forking not Cloning! 😅

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HALL OF SHAME 👎 :

// Includes Clones who are working against the MIT Licence and Distributing Malware. All Flaws are mentioned. 😑

• Lamina previously Calculator has undergone Malware Attacks.

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⚠️ IMPORTANT NOTICE ⚠️

Please be aware: There are fraudulent repositories on GitHub that are cloning this project's name and using AI-generated readmes, but they contain completely random and unrelated files in each release. These are NOT official versions of this project.

ALWAYS ensure you are downloading or cloning this project ONLY from its official and legitimate source: https://github.com/Chill-Astro/Lamina-Calculator

I am trying my best to report these people.

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⚠️ Smoking Gun for Danger :

Caution

MALWARE ALERT: If your downloaded folder looks like the images below, DO NOT OPEN any files. Format the drive or delete the folder immediately. Official releases are ONLY .msix files or an Inno Setup .exe.

View Details

• Suspicious Windows Executables: Files ending in .exe, .bat, or .dll (e.g., luau.exe, StartApp.bat).
• Compressed Archives: This project is distributed as an MSIX, never as a .zip or .7z containing Windows binaries.
• Hidden Scripts: Text files like asm.txt used to execute malicious code on your PC.
• The Following Folder Structure is used by Malware (Shown in a VM) :

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Note from Developer :

Appreciate my effort? Why not leave a Star ⭐ ! Also if forked, please credit me for my effort and thanks if you do! :)

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