Papers and textbooks that fit your phone.
PDFreflow turns a PDF into one column of text that fits your screen, so you just scroll. Make the text as large as you like, and zoom into any figure. Two-column papers, textbooks and manuals too, with formulas and figures kept in place.
Free to try: the first 30 pages of every document are free, and during the open beta one tap unlocks the rest of a book.
Works with text‑based PDFs. Scanned documents aren't supported.
Not a mock-up.
A real paper, in the real app.
Page 1 of the BERT paper (Devlin et al., 2019): the PDF as printed, and the same page in PDFreflow. Shown in dark mode. Light mode, color palettes and fonts are yours to choose. Nothing here is drawn.
Engineered for the documents
other readers give up on.
One Readable Column
Two-column papers become a single column that fits your screen. Formulas, figures and captions stay in place.
Private by Design
Your documents never leave your phone. No accounts, no cloud, no ads. Reading stays between you and your library.
Built for Deep Reading
Scroll straight through, page after page. Dark mode, and your choice of font, size and spacing. Handles 1,000‑page manuals. Reads EPUB, TXT and HTML too.
I built this because I was tired of
pinch-and-zooming.
I'm an indie developer. I read a lot of papers and technical PDFs on my phone: on the train, in waiting rooms, in bed. Every single time, the experience was the same: pinch, zoom, drag, scroll, repeat. A two-column paper on a phone is simply unreadable.
I went looking for an app that solved this. What I found was a category of bloated PDF readers that hadn't meaningfully improved in a decade. Most don't have a real dark mode. The good ones charge a subscription for features I didn't want: cloud storage, e-signatures, AI summaries. I just wanted to read.
Even Adobe, the company that invented the PDF, ships a reflow that breaks on many real layouts. That's when I realized this problem is harder than it looks. Which is probably why nobody's solved it well.
I'm building PDFreflow on my own. It does one thing: takes complex, multi-column PDFs and reflows them into a single column you can actually read. Formulas preserved. Figures preserved. No ads. No data harvesting. Your PDFs stay on your phone.
If you've ever wanted to throw your phone across the room while reading a paper, this is for you.
— Mark Eggenstein
The beta is open, and I read and answer every piece of feedback.