The science behind how you read
Speed reading apps have been getting it wrong for decades. They prioritise speed over comprehension, RSVP over science. Here’s why Accruva is different — and what the research actually says.
The problem with speed reading apps
Most speed reading apps use a single technique: Rapid Serial Visual Presentation (RSVP). One word flashes on screen at a time, as fast as you can tolerate. It feels fast. It looks impressive. And the research says it destroys comprehension.
RSVP eliminates saccadic eye movements — the tiny jumps your eyes make between words and phrases during natural reading. These movements aren’t wasted motion. They’re how your brain builds spatial memory of the text, allowing you to mentally “look back” at earlier passages while processing new ones. Remove saccades, and you remove the scaffolding your working memory uses to build understanding.
This doesn’t mean RSVP is useless. For certain types of text, at moderate speeds, with the right visual aids, it can be genuinely effective. The problem is that every other speed reading app treats RSVP as the only technique. Accruva treats it as one of five.
If you’re curious how reading speed actually breaks down across age groups and reading formats, we’ve put together a separate guide on WPM benchmarks and what the research says about average reading speed. The short version: the popular “300 WPM average” is wrong, and the real number is more interesting.
Five principles. Five reading modes.
Each of Accruva’s reading modes is built on a different cognitive science principle. Because different material, different goals, and different brains need different approaches.
Optimal Recognition Point (ORP)
Every word has a point — usually slightly left of centre — where your eye naturally fixates for fastest processing. Accruva highlights this point, reducing the cognitive work of finding it yourself.
Used in: Focus, Guided RSVP, Chunking ORPPhrase Chunking
Reading research shows we process text in phrase groups, not individual words. Accruva’s line-aware chunking groups words into natural semantic units, reducing the number of eye fixations needed per line.
Used in: Chunking Highlight, Chunking ORPGuided Visual Pacing
External pacing guides help regulate reading speed while preserving the spatial context that pure RSVP destroys. The Teleprompter mode maintains surrounding text while highlighting the current word.
Used in: Teleprompter (1-line, 3-line, full-page)Typographic Anchoring
Bolding the initial letters of each word creates visual anchors that guide fixation patterns. Research on bionic-style typography shows it can reduce subvocalisation and increase reading fluency for some readers.
Used in: Bold Flow (3 intensity levels)Self-Paced Active Reading
Not every study session is about speed. Deep comprehension requires the freedom to pause, re-read, and annotate at your own pace. Scroll mode is where you apply what you’ve practised in the other four modes to real study material — with position tracking that remembers exactly where you left off across every document.
Used in: Scroll (free-form reading with position tracking)Spaced repetition: the most evidence-backed study technique
Spaced repetition is not a trend. It’s one of the most robustly supported findings in cognitive psychology, with over a century of research behind it. The principle is simple: you remember things better when you review them at increasing intervals, just as you’re about to forget them.
Accruva uses the SM-2 algorithm — the same algorithm that powers Anki, the gold standard in spaced repetition software. Each flashcard tracks its own ease factor, interval, and repetition count. Four quality ratings (Again, Hard, Good, Easy) determine the next review date. Cards you find difficult appear more frequently; cards you know well space out automatically.
The Smart Review dashboard (Pro) combines flashcard reviews with quiz results to create a unified daily study plan that automatically targets your weakest areas. Stop wasting time reviewing what you already know.
See it in action
Here’s how spaced repetition actually works inside Accruva — from generating flashcards to reviewing them at the perfect interval.
Upload any document and generate flashcards with one tap. The AI extracts key concepts and creates front/back pairs automatically.
Review cards at scientifically optimal intervals. Rate each card and the SM-2 algorithm adjusts your next review date automatically.
Why neurodivergent readers need different tools
The speed reading industry has historically assumed a neurotypical reader: consistent focus, stable working memory, uniform processing speed. That’s not how most brains work — and it’s especially not how ADHD or dyslexic brains work.
ADHD readers often struggle with sustained attention during traditional reading because the visual complexity of a full page of text competes for limited attentional resources. Accruva’s ADHD/Zen Mode eliminates this competition entirely: pure black screen, single word, hidden controls. Nothing to distract from the text itself.
The research backs this approach. A 2025 study by Moussaoui and colleagues found that RSVP reading boosts comprehension by approximately 13% for adults with ADHD — a direct reversal of what it does for neurotypical readers. We break down the full study and what it means for ADHD reading in a separate piece.
Dyslexic readers frequently experience letter-reversal confusion and visual crowding — where letters that are too close together become difficult to distinguish. Accruva’s dyslexia typography uses Atkinson Hyperlegible with dramatically increased spacing (letter spacing 2.5, word spacing 4.0, line height 2.0) specifically designed to reduce crowding effects.
Read the way your brain was built to
Five reading modes built on cognitive science. Not one technique forced on every reader. Find the mode that fits your brain.
