QED Solver

QED Solver was a math-computing product for Windows, iPad, and iPhone. It paired a syntax-highlighting editor with compiled solving, charts, reports, user functions, and examples for science, engineering, and general math problems.

Original product story

A solver built around writing the problem, not rearranging it first.

QED Solver was a computing platform for science and engineering problems. It was not a pocket calculator. Users wrote a problem in readable form, ran it, then reviewed solved variables, charts, and a report.

QED Solver for iPad shipped on March 9, 2012. QED Solver for iPhone followed on April 17, 2012. Both releases centered on smart problem entry, syntax highlighting, built-in functions, a fast computation engine, charts, solution reports, and user-defined functions.

QED Solver for Windows used a two-pane desktop workflow: quick-start editor on the left, generated report on the right, a 14-day free trial, and a $99 purchase path. The screenshot set also preserves examples for linear equations, function plots, finance calculations, coupled nonlinear equations, user functions, and numerical integration and differentiation.

Launch artifacts

One product idea ran through every launch artifact: type the math and let the engine work.

App icon

The icon made the product promise tactile: variables, equality, comparison, plus, and minus controls inside an early App Store-style square.

QED Solver wordmark

QED kept a compact wordmark in the nav, with the app icon next to the product name.

Archived QED Solver iOS homepage hero with the app icon, iPad and iPhone screenshots, and product copy.

Original iOS homepage hero

The iOS homepage paired the icon with iPad and iPhone screenshots and the line that calculations had never been so easy.

March 9, 2012 QED Solver iPad press release first page.

2012 iPad press release

The iPad release called QED a mathematical computing application for science, engineering, and general math problems.

April 17, 2012 QED Solver iPhone press release first page.

2012 iPhone press release

The iPhone release added device requirements, launch pricing, and a compact list of what QED could solve.

What it shipped with

The product mixed a smart editor, a compiled computation engine, and report output.

Natural problem entry

QED syntax stayed close to natural language. The editor exposed math keys for quick entry instead of forcing users to prearrange every equation.

Compiled solving

QED optimized and compiled a problem to binary code before running it through its computation engine. The product materials put most solve times at a few milliseconds.

Charts and reports

Solved problems produced reports with variables, statements, functions, and charts. The Windows screenshots show reports beside the editor, while the iPad and iPhone screens put report viewing behind the solution.

User-defined functions

The examples include single-line and multi-line user functions, local variables, function parameters that can be expressions, and reuse of functions inside other equations.

Examples and help

QED shipped with in-app help and more than two dozen examples. The Windows archive includes examples, a Moody diagram, chart output, and help screens.

One product across three surfaces

QED Solver had separate Windows, iPad, and iPhone surfaces. The mobile versions focused on tapping Solve, custom keyboards, AirPrint, App Store availability, and a compact version of the same solver workflow.

Archive notes

The preserved copy is specific about platform, pricing, and scope.

The supported problem types were named

Supported problem types included systems of equations, linear equations, nonlinear equations, function minimizations, derivatives, and definite integrals. The example tabs also included finance calculations and numerical integration and differentiation.

The iPad and iPhone releases were separate

The preserved press material dates the iPad release to March 9, 2012 in the Productivity category and the iPhone release to April 17, 2012 in the Education category. Both required iOS 5.0 or later.

The Windows product had its own purchase path

The Windows product had an introduction video, a free 14-day trial, and a purchase link. The purchase page listed QED Solver (PC) at $99.00 and pointed site-license requests to sales.

The source archive was filtered

The raw source bundle includes theme-demo pages and checkout receipt samples. This archive keeps the public product, press, support, and purchase copy, and leaves the private transaction examples out.

Screenshots

The interface had to make equations, answers, charts, examples, and help readable on three platforms.

QED Solver for Windows quickstart screen with syntax-highlighted equations beside a generated solution report.

Windows quickstart and report

The Windows surface put editable equations beside a live report with variables, user-defined functions, and solved statements.

The quickstart flow was blunt: enter the problem, then run it.
The editor kept the authored equations visible while the report pane turned the solved problem into a readable document.
Generated reports could include variables, statements, user-defined functions, and charts instead of a single calculator-style answer.
The launch path paired the quick-start video with a 14-day trial and a purchase route.

QED Solver for Windows thermophysical properties screen showing data, equations, and a fitted correlation report.

Fit equations to data

Users entered a function and data points; QED solved the function coefficients automatically.

Variable formatting

Variable output could be formatted with number display, units, and comments before appearing in the generated report.

QED Solver Windows report with chart examples and plotted series.

Report charts

Charts were part of report output and could be copied as SVG vector graphics into other applications.

Moody diagram example

The Windows screenshots used engineering examples, including a Moody diagram generated from the implicit Moody equation.

Windows help

QED included help and example problems for solving and plotting. The help screen preserves that teaching layer.

QED Solver iPad solution popover showing solved values and a chart with a Show Solution Report button.

iPad solution view

The iPad app kept the editor visible while a solution panel showed variables, charts, and the path into the full report.

iPad custom keyboard

Mobile entry depended on a custom keyboard and one-tap access to built-in functions, matching the natural-entry pitch.

iPad reports

The iPad report screen preserved solved variables, statements, and charts in a document-like surface that could be shared or printed.

QED Solver iPad problem list organized with folders and saved examples.

Problem management

Folder-based problem management kept examples and solved work organized.

QED Solver iPad help screen listing constants, operators, and example resources.

iPad help resources

Help was not just a website fallback. The iPad app carried constants, operators, example problems, and function reference material inside the product.

iPhone getting started

The iPhone screen made the core action literal: write the equations and tap Solve.

QED Solver iPhone solution screen with solved variables and chart previews.

iPhone solution view

The iPhone solution view compressed answers, charts, and report access into the small-screen version of the workflow.

QED Solver iPhone custom keyboard for entering operators, functions, and math symbols.

iPhone keyboard

The iPhone app used a custom keyboard so operators, functions, and symbols stayed close to the editor.

iPhone reports

Reports were not desktop-only. The iPhone screenshots preserve the same variables, functions, statements, and chart output in a smaller format.

iPhone help topics

The mobile help index covered constants, functions, examples, inequalities, and operators, keeping reference material inside the app.

Product record

The record moves from the 2012 iOS releases to the 2013 Windows launch.

March 9, 2012

QED Solver for iPad launched

The iPad release positioned QED as a mathematical computing application for science, engineering, and general math problems. It listed iOS 5.0, 3.3 MB, and a $6.99 limited-time App Store price.

April 17, 2012

QED Solver for iPhone launched

The iPhone release repeated the smart editor, syntax highlighting, built-in functions, fast engine, charts, reports, and user-defined functions pitch. It listed iOS 5.0, 3.7 MB, and a $2.99 limited-time App Store price.

2013

QED Solver for Windows launch

QED Solver for Windows launched in 2013 with an introduction video, a 14-day trial, and a $99.00 purchase price. The desktop product kept the same solver model but used a two-pane editor and report workflow.

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