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A Math & Engineering Offline first

Local Matrix Calc

A serious matrix and unit-aware calculator that works offline.

$99 starting at · one-time

Air-gapped from $4,999 / year

Editions
Solo · Firm · Site · Air-gapped
Deployment
Workstation · LAN · Air-gap
License
Perpetual; annual air-gap
Data
Stays on your machine
View licensing Contact Developer
Offline activation · No account required
// Overview

Why teams choose Local Matrix Calc.

Local Matrix Calc handles matrix operations, linear algebra, unit-aware arithmetic and scripted calculations in a single fast workspace. Results stay inspectable and reproducible.

Save worksheets as plain files, plot functions locally, and export results to CSV without an internet connection.

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// Core capabilities

What it does well.

Five capabilities that matter in daily use, not a feature list written for a press release.

01

Matrix algebra

Inverse, determinant, decomposition and solving systems.

02

Unit awareness

Convert and validate physical units through every calculation.

03

Scripting

Automate repeated calculations with a small expression language.

04

Plotting

Render 2D and 3D plots directly from worksheet data.

05

Reproducible worksheets

Save inputs, formulas and outputs in one file.

// Built for
Engineering calculations
Coursework
Data exploration
// Licensing

Editions and pricing.

Solo, Firm and Site are one-time purchases. Air-gapped is billed annually with updates included. Founder's is 50 percent off and limited to the first 50 licenses.

USD · Taxes at checkout

Edition Best for Price Seats Deployment Updates Support Purchase
Solo Individual One practitioner $99 one-time 1 seat Single workstation 12 months included Email support Buy
Firm Small team Up to 5 people $249 one-time Up to 5 seats Team / LAN install 12 months included Priority email Buy
Site Organization Multi-site teams $495 one-time Up to 25 seats Site-wide deployment 12 months included Priority + onboarding Buy
Air-gapped Isolated network Classified environments $4,999 per year Unlimited seats Offline activation Included while subscribed Dedicated engineer Buy
Founder's 50% off · 50 only First 50 buyers $49.50 one-time 1 seat Single workstation 12 months included Email support Buy
All prices in USD Founder's limited to 50 licenses Air-gapped billed annually

Licenses are delivered by email after checkout. Team and site editions can be procured by purchase order — contact the developer for a written quote.

// FAQ
Does Local Matrix Calc require an internet connection?
No. Every edition runs fully offline. The Air-gapped edition is specifically designed for networks with no external connectivity at all, including offline license activation.
How is the license delivered?
A signed license file and download link are sent by email immediately after checkout through Creem. Air-gapped customers receive an offline activation file and a verifiable checksum.
Can we deploy this across a team?
Firm covers up to 5 seats and Site covers up to 25. Air-gapped provides unlimited seats on an isolated network, billed annually. Larger deployments can be quoted individually.
// Get started

Own Local Matrix Calc forever.

One payment for a perpetual license. No subscription hiding in the fine print, no telemetry, no cloud dependency.

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