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A PDF reader built for studying, not just opening files

Your textbooks, question papers, lab manuals and EnginPath roadmaps — highlighted, collected into formula sheets, tracked and revised in one place. It runs on your own laptop, works with no internet, and never uploads anything.

⬇ Download for Windows Try it here first

Free · Windows 10/11 64-bit · no account, no subscription · everything stays on your machine

Illustration of the Study Reader: a PDF page with a highlight, a snipped formula and the unit converter

Try it right here

This is the actual application running in your browser — not a video, not a mock-up. The same code you'd install. Have a go, then download it if you like it.

Live demo

A sample Engineering Mechanics document is already open.

Open full screen ↗
Try: 🖍 drag across a paragraph to highlight ✂ snip a formula on page 2 ✅ see your progress by unit 🧮 the calculator and unit converter Ctrl+F search the whole document ◐ night mode

What it does

Everything a PDF reader does, plus what you need when the PDF is a textbook and there's an exam coming.

Also: full-text search, two documents side by side, tabs and thumbnails, night mode, and a backup file you can carry to a new laptop.

Get it on your laptop

Download, run, done

One file, nothing to unzip. Double-click it, follow the installer, and it appears in your Start Menu and in Add or remove programs like any normal app.

⬇ Download for Windows (64-bit)
Windows will warn you twice — here's why, and what to click

While downloading, your browser may say the file “isn't commonly downloaded”. Open the Downloads panel, click the … beside the file and choose Keep. When you run it, SmartScreen may show a blue box — click More info, then Run anyway.

Neither means anything is wrong with the file. Windows shows this for any new program without a code-signing certificate, and those cost several hundred dollars a year — which we'd rather not add to a free app.

To check you got the real file, run Get-FileHash <file> in PowerShell and compare it with:

173140066f4a056a280c861192a2c23b24c0ab2293af1ffff4156111f08b87b2