Strobe vs Lumen Reader
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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Read faster. Stay focused. Keep your documents private. Strobe is a fast, focused speed reader for iPhone, iPad, and Mac. Using Rapid Serial Visual Presentation (RSVP), Strobe presents text one word at a time so you can move through dense material without constantly scanning across the page. Import a PDF, EPUB, plain-text, or Markdown file, or paste text directly. Choose your pace from 100 to 1000 words per minute and start reading. BUILT FOR FOCUSED READING • RSVP speed reading — read one word at a time in a clean, distraction-free view • 100–1000 WPM — set the pace that works for you • Smart Timing — automatically gives longer words the extra time they need • Adaptive pacing — optional sentence pauses and cognitive-complexity timing help difficult text feel more natural • ORP highlighting — highlights each word’s Optimal Recognition Point to keep your eyes anchored • Hold or hands-free — hold to read and release to pause, or switch to tap-to-play reading • Live speed control — adjust your reading speed without losing your place • Passage view and search — see surrounding text, search for words or phrases, and jump directly to a result • Chapter navigation — move between chapters and track your progress • Resume automatically — Strobe remembers your position and reading settings • Flexible typography — choose from seven fonts and adjust text size • Keyboard controls — use Space, arrow keys, and Escape on Mac and iPad with a hardware keyboard IMPORT WHAT YOU ALREADY READ Strobe supports PDF, EPUB, plain-text, and Markdown files. You can also paste text directly for quick reading sessions. PRIVATE BY DESIGN Your documents and reading progress stay on your device. Strobe requires no account, uses no cloud sync, and does not collect analytics or personal data. FREE AND OPEN SOURCE Strobe is free and open source, built for readers who want a fast, focused tool without accounts or tracking. Whether you’re studying, researching, working through long documents, or simply trying to get through your reading list faster, Strobe gives you precise control over how you read.
Lumen Reader
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Lumen Reader turns any webpage, EPUB, PDF, or DOCX into a clean audiobook with on-device narration, lock-screen controls, and word-by-word highlights. Paste a link, tap Listen — no ads, no account, no subscription. PASTE A LINK. GET AN AUDIOBOOK. Found a 10,000-word essay you'd never sit down to read? An hour-long blog post? A web-novel chapter buried under five ad slots? Paste the URL into Lumen. The page is stripped of pop-ups, trackers, cookie walls, newsletter dialogs, and "related articles" carousels — then handed to a natural narrator that starts reading aloud while you keep walking, cooking, or driving. POCKET AUDIO PLAYER Lumen feels like a podcast app, not a reading app, when you want it to. The big Listen button is on every book and every imported article. Lock-screen controls let you play, pause, scrub, skip back 15 s, or jump chapter without unlocking your phone. AirPods double-tap, CarPlay, Dynamic Island, and Bluetooth headphones all work out of the box. Background audio keeps the narrator going when the screen is off. OR READ INSTEAD The same content is also a beautifully typeset, minimalist reader. Three themes (Dark, Sepia, Light) and four type families (Georgia serif, sans, rounded, OpenDyslexic) tuned for multi-hour sessions. Sentence-granular highlights in five colours, per-chapter bookmarks, and a notes catalog searchable across every book. A soft amber word-highlight scrolls along the page in time with the audio when you read and listen at the same time. BUILT-IN LIBRARY Open the app and there's already something to read or listen to. A curated catalog of public-domain titles is one tap away: • The Holy Bible (King James Version) • The Holy Qur-ān (public-domain English translation) • The Bhagavad Gita • The Dhammapada · Tao Te Ching · Analects of Confucius • Meditations (Marcus Aurelius) · The Art of War · Walden • Pride and Prejudice · Frankenstein · Dracula · Moby-Dick • Sherlock Holmes · Alice in Wonderland · The Iliad & The Odyssey • …plus developer docs (Snowflake, Databricks) rendered on-device. Books download straight from canonical archives like Project Gutenberg in seconds — no account, yours forever. YOUR OWN FILES TOO Drop EPUB, PDF, DOCX, TXT, Markdown, or HTML in from Files, iCloud Drive, Dropbox, Google Drive, or OneDrive. Lumen parses chapters into the same clean reader and audiobook UI. ONE LIBRARY ON EVERY DEVICE iCloud syncs your reading progress, highlights, notes, and imported books across iPhone, iPad, Mac, and Apple Vision Pro — silently, with no login. Start a chapter on your phone, finish it on your iPad with the audio resuming at the exact word. OFFLINE BY DEFAULT Every page and audio session is generated on-device. Once a book is downloaded, you never need a signal to re-open it. PRIVACY No account. No analytics. No tracking. Highlights, notes, and progress stay in your own iCloud — never on our servers. The app talks only to the page you explicitly paste, or runs entirely offline against the bundled library. FINE PRINT Every catalog title is public domain or permissively licensed. Lumen does not bundle copyrighted prose and does not redistribute from its own servers — downloads go straight from the canonical archive to your device. For pages or files you import, you're responsible for the rights. Read it. Hear it. Pocket it.
Screenshots
Verdict
The clearest difference is update cadence: Lumen Reader at every 4 days against Strobe's every 2 weeks. Strobe's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
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.
Strobe ships an update every 2 weeks, Lumen Reader every 4 days. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.
| Parameter | Strobe | Lumen Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 13 MB | 98 MB |
| Age rating | 4+ | 4+ |
| Developer | Jaafar Abdeen | SAMANTH GURRAM |
In-app purchases
Strobe
No in-app purchases
Lumen Reader
No in-app purchases





