Zen Book Tracker & Reading Log vs Devour
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zen Book Tracker & Reading Log
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Zen is an ebook reader and tracker that makes you want to read more by removing distractions, motivating you with analytics, providing tools to make reading effortless, and providing clean UI to ease your book tracking and planning. With intelligent AI that stays out of your way, you will understand better, remember more, and enjoy reading every day. Try Zen for free to improve your reading comprehension, save time, and build a reading habit that lasts. • Instant Clarity - Simplify complex passages with one tap • Smart Summaries - Get the main ideas without losing the meaning • Chapter Recaps - Jump back into any book without missing context • Reading Insights - Track progress, habits, and improvement • Fully Yours - Customize fonts, themes, and reading comfort • EPUB Friendly - Import and organize your entire library seamlessly • Complete Privacy - Your data never leaves your device. Even Zen AI runs right on your phone so only you can see your activity. -- Privacy Zen is committed to protecting your privacy. Zen does not collect any personal data or share your reading habits with third parties. All your reading data is stored locally on your device. The only time Zen connects to the internet is to download the Zen AI model, which is also optional. Once downloaded, Zen AI runs locally on your device. -- Terms & Conditions Don't misuse the app, break laws, or try to mess with our services. By using Zen, you agree to play nice and use it as intended, following all applicable laws and regulations. For the latest information on Zen's Privacy Policy and Terms & Conditions, please visit https://zen.ksapps.com.
Devour
This app helps you read books and articles significantly faster using a technique that displays words one at a time. Import various file types and web content, then adjust your reading speed. Track progress, set goals, and organize your library with this efficient reading tool.
- RSVP speed reading technology
- Import EPUB, PDF, web articles, and more
- Adjustable speed control (100-1000+ WPM)
- Built-in speed test
- Progress tracking and automatic saving
- Reading statistics and daily goals
- Smart library organization
- iCloud sync
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DEVOUR YOUR READING LIST Download free and start speed reading in seconds. Devour uses RSVP (Rapid Serial Visual Presentation) to display words one at a time right where your eyes are focused—so you read 2-3x faster without learning any special technique. Just import, tap play, and devour. HOW IT WORKS Traditional reading wastes time on eye movements. Devour eliminates that by presenting each word at a fixed point with the Optimal Recognition Point highlighted, so your brain processes text faster instantly. IMPORT ANYTHING EPUBs, PDFs, web articles, DOCX, TXT, Markdown, HTML, RTF—if you can read it, Devour can speed-read it. Paste text or extract content from any URL. Your entire reading list in one app. POWERFUL FEATURES Speed Control — Adjust from 100 to 1,000+ words per minute. Start at your comfort zone and gradually increase as your brain adapts. Built-In Speed Test — Discover your baseline reading speed, then see how much faster you read with RSVP technology. Progress Tracking — Resume exactly where you left off. Every document saves your position automatically. Reading Statistics — Track total words read, reading time, average WPM, and daily streaks with beautiful visualizations. Daily Goals & Achievements — Set word count goals, build streaks, and earn milestones as your reading habit grows. Smart Library — Organize with favorites, reading status, and content type filters. Search and find anything instantly. iCloud Sync — Keep your library, reading progress, and statistics synchronized across all your Apple devices. Dark Mode — Automatic system theme matching or manual light/dark selection for comfortable reading anywhere. THE SCIENCE RSVP has been researched for decades as a method to increase reading speed. By presenting words at a fixed focal point with ORP highlighting, your visual system processes text more efficiently. Most readers see significant speed improvements from their very first session. PREMIUM Devour is free to use with ads. Go premium to remove all ads for an uninterrupted reading experience and support independent app development. START READING FASTER Import your first document and feel the difference. That article you bookmarked last week, the novel on your shelf, the PDF report for work—Devour helps you get through it all. Faster. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Zen Book Tracker & Reading Log at none against Devour's shown. Devour's advantage is update cadence (weekly vs monthly) and iOS requirement (13.4 vs 26.0). On price, 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. Zen Book Tracker & Reading Log sells 2 in-app purchases, starting at $1.99 per 7 days and Devour sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Zen Book Tracker & Reading Log ships an update monthly, Devour weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Zen Book Tracker & Reading Log | Devour |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 30 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Karandeep Singh | Brett Cassidy |
In-app purchases
Zen Book Tracker & Reading Log
- Zen Plus Weekly3 Days trial$1.997 Days
- Zen Plus Yearly$29.991 Year
Devour
- Monthly$1.991 Month
- Yearly$14.991 Year
Questions
Is Zen Book Tracker & Reading Log free?
Is Devour free?
Do Zen Book Tracker & Reading Log or Devour have ads?
Which is updated more often, Zen Book Tracker & Reading Log or Devour?
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