FLOW runs entirely client-side — no server, no account, no uploads. It parses 13 file formats natively in the browser, including MOBI/AZW via a hand-rolled PalmDOC decompressor, EPUB, PDF, DOCX, and Markdown. No competitor does that without a backend. The speed ramp engine uses a cubic ease-in curve (120→650 WPM) that mirrors how reading cognition actually works, paired with optical pivot highlighting on each word's focal letter. Zero config, drag-and-drop, light/dark themes, fully private.
Hey PH! I built FLOW because every speed reader I tried either wanted me to paste plain text or sign up for an account just to read my own files.
FLOW runs 100% in your browser. Drop an EPUB, PDF, MOBI, Markdown, DOCX (13 formats total) and it starts flashing words using RSVP. No server ever sees your books.
The part I'm proudest of: the speed ramp. Instead of a fixed WPM, it eases you from 120 to 650 using a cubic curve so your brain locks in before it speeds up. Tiny detail, huge difference.
Would love to hear what formats or features you'd want next 👇
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Great experience overall!
It would be great if you could add speed settings and support for additional languages and scripts—for example, Cyrillic for Russian.
Deconflict
Great experience overall!
It would be great if you could add speed settings and support for additional languages and scripts—for example, Cyrillic for Russian.
Deconflict
@uraji_san Added support for speed settings and seeking, great ideas.