Read faster with bionic text.
Bionic text is one of many tools in Nook's reading system, built to help you
read faster, stay focused, and finish what you start.
Bionic reading guides your eyes through text more efficiently. Your brain recognizes each word faster because it can complete the word from the bolded beginning.
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How to use bionic reading
The effect is on this page. To use it on any article, PDF, or EPUB:
- 1. Add Nook to Chrome. Takes a few seconds from the Chrome Web Store.
- 2. Open any article. Or import an EPUB or PDF into Nook.
- 3. Toggle Bionic Text. Word beginnings bold in place. Turn it off if it does not help.
Why reading online is exhausting
The problem isn't your attention span.
It's that text has no visual guides.
Your eyes wander
Without visual anchors, your eyes drift across the page. Every word requires the same mental effort.
accommodate
parsing letter by letter
Slow word recognition
Your brain processes each word from scratch. Long words take longer. It's exhausting.
Constant re-reading
You read the same sentence three times without realizing. Nothing sticks.
After 5 minutes of reading
Mental fatigue
Reading feels like a chore. Your brain is doing too much work just to decode each word.
47 tabs open, 0 articles finished
You give up
Articles pile up. Books go unfinished. You save things “for later” that never comes.
Nook is built for faster, focused reading.
Bionic text plus a suite of tools
to help you read faster and stay focused.
Bionic reading guides the eye through text.
Bionic Text
Highlights word beginnings so your brain recognizes words faster with less effort.
Does it work for ADHD? →Autopace
Text moves at your rhythm so you always have a guide to follow. No more losing your place.
Listen
Natural voices read the page aloud while each word highlights. Click any word to jump.
See how Listen works →One line at a time
keeps your focus
sharp and clear.
Line Tracking
Focus on one line at a time to prevent skipping lines and losing your place.
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Specialized Fonts
Choose from 7 fonts including OpenDyslexic, Atkinson Hyperlegible, and Lexend.
See our font guide →Relax your eyes
Calm Backgrounds
Reduce eye strain with softer colors. Cream, sepia, dark mode, and more.
From our
community on
Here's what other users had to say about Nook.
I'm reading 2x faster now. The bionic font helps my eyes glide through text without getting stuck on every word.”
Read anywhere, on any device.
Nook works right in your browser. Your reading progress syncs automatically between your phone, tablet, and laptop.
Desktop
Perfect for deep work on your laptop or external monitor.
Tablet
The ideal form factor for long reading sessions on the couch.
Phone
Pick up right where you left off when you're on the go.
Why readers love bionic text
Read 2x faster
Bionic fixation points guide your eyes faster through text. Finish more in less time.
Less mental effort
Your brain completes words from bolded beginnings, reducing cognitive load.
Better focus
Visual anchors keep your eyes on track. Less wandering, more comprehension.
Finish what you start
Reading feels easier, so you're more likely to complete articles and books.
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Customizable
Adjust fonts, colors, speed, and spacing to match your reading style.
Zero distractions
Clean reading view strips away ads and clutter. Just you and the text.
Frequently asked questions
Everything you need to know about bionic reading
Bionic reading bolds the first few letters of each word so your eyes have a place to land. Your brain fills in the rest, which can cut rereading and make long pages easier to finish. It is a display effect, not a font file.
Many readers report improved reading speed and focus with bionic text. It works by guiding your eyes through text more efficiently, reducing the mental effort needed to recognize each word. The best way to know if it works for you is to try it - Nook offers a free 3-day trial.
You get 3 days of the full reading tools, no credit card. After that it is $5 a month if you keep using them.
Many people with ADHD find bionic reading helpful because it provides visual anchors that keep their eyes moving forward. Combined with Nook's other features like autopace and chunking, it can significantly improve focus and reading completion rates for ADHD readers.
With Nook, you can import EPUB books and read them with bionic text enabled. You can also import PDFs and any web article. Nook works as a Chrome extension, so any long-form content on the web can be transformed into bionic text.
After installing the Nook Chrome extension, simply click the extension icon on any article or webpage. In the reading view, tap the settings icon and toggle on 'Bionic Text'. It works instantly on any content.
Yes! Nook can extract text from PDFs and display it with bionic formatting. Simply upload your PDF to Nook and enable bionic text in the settings. This works great for research papers, documents, and ebooks in PDF format.
Nook is a Chrome extension that includes bionic reading along with other reading enhancement features. It works on any website, article, or long-form content. You can also import EPUBs and PDFs directly.
Still have questions?
Contact usWondering how Nook stacks up?
See how Nook's bionic reading compares to other tools that claim to help you focus.
Nook vs Lumina Reader
Bionic text + autopace vs RSVP word-flash
Nook vs Celer
Two ADHD reading tools with different approaches
Nook vs Speechify
Read and listen vs celebrity-voice audio
Nook vs Readwise Reader
Focus-first reading vs knowledge management