Strobe vs FocusWord
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Strobe
This app enhances reading speed and focus with a clean interface for PDFs and EPUBs. It offers customizable reading speeds, font choices, and smooth navigation to reduce eye fatigue and improve comprehension.
- RSVP reading interface
- PDF and EPUB import
- Adjustable reading speed (100-1000 WPM)
- Customizable text size and fonts
- Hold-to-read interaction
- Automatic progress saving
- Chapter navigation
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Speed read your own books and documents, one word at a time. No ads, no subscription, no account. Strobe is a speed reading app for iPhone, iPad, and Mac. It uses Rapid Serial Visual Presentation (RSVP): each word appears in the same spot on screen, so your eyes stay still instead of scanning across lines. Import a PDF, EPUB, plain-text, or Markdown file, or paste an article, then read at 100 to 1,000 words per minute. HOLD TO READ • Press and hold to read. Let go to pause. • Slide up or down while you read to change speed without losing your place. • Swipe sideways while paused to step word by word. • Prefer hands-free? Switch to tap to play. TIMING THAT FOLLOWS THE TEXT • Smart Timing keeps longer words on screen a little longer. • Punctuation Pauses slow down at sentence ends, commas, dashes, ellipses, and closing quotes, and you set the length of each. • Complexity Timing speeds up common words and slows down rare ones. • Acronyms and hyphenated words get extra time automatically. • Blank After Sentences adds an optional moment of empty screen between sentences. A FIXED POINT FOR YOUR EYES • Each word lines up on a red focus letter, its Optimal Recognition Point (ORP). • Show the previous and next words faintly on either side. • An open quote or parenthesis stays faintly above the word until it closes. YOUR LIBRARY • Every document gets a cover, and Continue Reading takes you back to your exact word. • EPUB tables of contents and PDF bookmarks become chapters, each with its reading time at your speed. • Open the full text with your place highlighted, search for any word or phrase, and tap a word to resume from there. • Page numbers, running headers, and footers are removed on import. • Chinese, Japanese, and Korean text is split into words, and Arabic keeps its connected letterforms. MAKE IT YOURS • Seven fonts, adjustable text size, and four text colors. • A true black background for OLED screens and reading in the dark. • Every document remembers its own speed. • Keyboard shortcuts on Mac and iPad: Space to read, arrow keys to step, ⌘N for new text, ⌘O to import. • Works with VoiceOver, Larger Text, and Reduced Motion. PRIVATE BY DESIGN Your documents and reading progress stay on your device. Strobe needs no account and has no ads, analytics, or tracking. FREE AND OPEN SOURCE Strobe is free, with no subscription or in-app purchases. The source code is public on GitHub under the Apache 2.0 license. Strobe can't import DRM-protected EPUBs or password-protected PDFs.
FocusWord
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Your phone was designed to scatter your attention. FocusWord reverses the equation. FocusWord presents your books one word at a time on a full dark screen. Each word is positioned at its Optimal Recognition Point. Smart Slowing pauses naturally at sentence boundaries. Your phone becomes a place of focus instead of distraction. No willpower required. No fighting notifications. Just you and the words. IMPORT YOUR BOOKS Import any EPUB from your device. Navigate chapters. Track your reading progress. This is a real reading app for people who actually read books. READ AT YOUR PACE Adjust speed from 100 to 1000 WPM — whatever pace lets you focus completely. Start slow, build up naturally. Smart Slowing adapts to punctuation so the rhythm feels like reading, not a metronome. DESIGNED FOR FOCUS One word. Full screen. Zero distractions. Auto-hiding controls disappear within milliseconds. Gesture-only interaction while reading. The app becomes invisible so the book can take over. BUILT FOR BRAINS THAT WORK DIFFERENTLY ADHD-friendly design. VoiceOver support. Right-to-left reading. Reduce Motion compatibility. Focus isn't a character trait you lack — it was just never properly supported. BUY ONCE. READ FOREVER. No subscriptions. No ads. No dark patterns. No account required. One purchase, unlimited books, every feature. Your books stay on your device. Your data stays yours. FocusWord features: • One-word-at-a-time focused reading • Smart Slowing at sentences and clauses • 100–1000 WPM speed control • Full EPUB import and parsing • Chapter navigation with progress tracking • Reading position auto-save • Dark interface (WCAG AA contrast) • Accessibility: VoiceOver, RTL, Reduce Motion • Gesture controls: tap, swipe, long-press • iPhone and iPad
Screenshots
Verdict
Strobe and FocusWord are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.
| Parameter | Strobe | FocusWord |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 13 MB | 8 MB |
| Age rating | +4 | 4+ |
| Developer | Jaafar Abdeen | Marcelo Alves |
In-app purchases
Strobe
No in-app purchases
FocusWord
No in-app purchases









