Comparison

BookFusion vs Sightlines

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BookFusion

Manage, read, and organize your entire eBook collection across all devices with cloud synchronization. Customize your reading experience with extensive settings, highlights, and annotations. Supports various formats and offers text-to-speech functionality.

Highlights
  • Cross-platform eBook reader
  • Cloud synchronization
  • Organize with virtual bookshelves
  • Highlights and annotations
  • Text-to-Speech (TTS)
  • Send to Kindle
  • Calibre integration
Features
Read full description

Thousands of readers use BookFusion to manage, read and enjoy over 2 million eBooks. BookFusion is the best cross platform eBook reader and manager with cloud sync that allows you to easily read, organize and manage your eBooks across all your devices. ◇ Features ◇ Integrated Reader - Read all your EPUB, PDF, & CBZ/CBR eBooks both online and offline with clean and intuitive interface . Extensive Reader Settings - Customize your reading experience from vertical/horizontal margins, line spacing, fonts, bold/italics, colors and much more. Seamless Syncing - Sync your reading progress, highlights & annotations, eBooks and bookmarks across all devices. Pick up exactly where you left off. Organize & Manage - Easily organize and access all your eBooks seamlessly whether offline or online. Organize your eBooks using virtual bookshelves or place them into Series. Quickly find the eBook you are looking for using the category, tags or author filters. The perfect eBook Organizer & eBook Manager in one. Light & Dark Mode – Dark or Light the preference is yours! Highlights & Annotations - Highlight with your preferred colors and add tags to highlights to keep them organized. Sort your highlights by date or reading progress and easily export them to use in other apps in CSV, Markdown, HTML and PDF formats eBook Cloud - Keep your entire eBook collection at the tips of your fingers by storing them in the cloud and downloading them to read offline only when you need to. Any title just a click away. Text-to-Speech (TTS) - Listen to your favorite eBooks with Apple's native natural-sounding text-to-speech feature. Customize reading speed, voice and accessibility. Ideal for audiobook lovers busy lifestyles and accessible for all readers. Send to Kindle – Organize and quickly send your next read to your Kindle device with one click. Calibre Integration - The perfect Calibre Ally. Sync metadata, custom columns, series, tags and incremental updated PDF & EPUB files to all your devices. Your entire Calibre library on your devices when you need it. Vertical Writing Support - Read Chinese, Vietnamese, Korean, and Japanese eBooks with ease. Image/Area Highlights & Annotations (PDFs) - Easily annotate/highlight images, tables, graphs or even text. Any element at all in your PDF can now be highlighted and annotated. EPUB 3 Support - With support for the full EPUB 3 spec. You can read eBooks with rich interactivity support that includes video, audio, Q&A, games and much more. Widgets – Quickly view and jump back into your last read, currently reading, or highlights right from your home screen with iOS Widgets. Multi-Window Support (iPadOS & macOS) – Open multiple books side by side, drag books into Split View, or read and view highlights simultaneously. Perfect for multitasking, studying, or comparing texts. NOTE: You will need to install the BookFusion Calibre Plugin to sync your eBooks to all your devices. See the tutorial at https://support.bookfusion.com/hc/en-us/articles/360018852052-Installing-Using-the-BookFusion-Plugin-for-Calibre Open With - Don’t like the integrated reader? Use the open with functionality to send and read your eBooks with your preferred app. No lock-in Metadata & Book Details – Know what an eBook is about at a glance or easily edit the cover, description, author tags and other information. Additional Formats Supported via Web - These include: AZW, AZW3, AZW4, CBC, CHM, DJVU, DOCX, FB2, FBZ, HTML, HTMLZ, LIT, LRF, PRC, PDB, PML, RB, RTF, SNB, TCR, TXT, TXTZ in a single app. These must be uploaded via the Web App before using the iOS App Choose from over 70,000 eBooks ◇ Other ◇ Have feedback or just want to chat? We would love to hear from you. Drop us a line at support@bookfusion.com or join us for a chat on Discord at https://www.discord.gg/7v34UYq Terms of Service - https://www.bookfusion.com/terms Privacy Policy - https://www.bookfusion.com/privacy

About

Sightlines

Features
Read full description

Read faster and retain more with Sightlines—the speed-reading app powered by Rapid Serial Visual Presentation (RSVP) techniques. Traditional reading wastes up to 80% of your time on eye movement alone. Sightlines displays one word at a time in a fixed position, delivering text directly to your brain's optimal recognition point. The result? Reading speeds up to 800 words per minute with less eye strain and deeper focus. Speed Read Anything: • Import ePubs or PDFs from your files • Share documents directly to the app • Save articles instantly from any URL • Paste text directly for immediate reading • Sample content included to get started RSVP Technology That Works: • One word at a time display eliminates eye movement • Optimal Recognition Point (ORP) highlighting for faster processing • Adjustable speeds from 100 to 800 WPM • Smooth speed transitions while reading • Context view shows surrounding sentences when paused Track Your Reading Progress: • Detailed analytics: words read, sessions, and actual WPM achieved • Daily, weekly, monthly, and all-time statistics • Visual charts show your speed improving over time • Reading streaks keep you motivated and consistent • Automatic progress saving—pick up exactly where you left off Personalized Reading Experience: • 6 themes: Dark, Light, Sepia, Night, Paper, and System • Each book remembers your preferred reading speed • Chapter navigation for ePub books • Distraction-free, full-screen reading mode Who Is Sightlines For?: • Students tackling heavy reading loads • Professionals staying current with articles and reports • Book lovers who want to read more in less time • Anyone looking to improve focus and reduce screen fatigue Stop moving your eyes. Start moving through your reading list. Use of this app is subject to Apple's Licensed Application End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

BookFusion4 screens
Sightlines4 screens

Verdict

The call

The clearest difference is update cadence: Sightlines at every 4 days against BookFusion's every 10 days. BookFusion's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.6). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BookFusion sells 6 in-app purchases, starting at $1.99 per month and Sightlines sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

BookFusion ships an update every 10 days, Sightlines every 4 days. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
BookFusion versus Sightlines: the parameters behind the verdict, then further details
ParameterBookFusionSightlines
PriceFreeFree
Rating4.7 (521 ratings) — better—
Positive reviews76.4% of reviews—
Number of ratings521 — better—
Update frequencyEvery 10 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.6
Further details — not scored
Size158 MB12 MB
Age rating12+4+
DeveloperBookFusionKyle Foley

Bugs and requests

BookFusion

Reported bugs

5 issues
  • Highlights and notes not always saving properly
  • Reading position sometimes resets unexpectedly
  • Widget not functioning as expected
  • Occasional crashes and freezes
  • Issues with importing certain ebook formats

Requested features

6 requests
  • Add page numbers instead of just percentages
  • Implement a true dark mode
  • Improve PDF viewing and annotation capabilities
  • Add support for DJVU format
  • Provide an option to purchase a lifetime license
Show 1 more
  • Implement better organization tools like folders/shelves

Sightlines

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

BookFusion

Subscriptions6
  • Casual Monthly$1.991 Month
  • Advanced Monthly$4.991 Month
  • Power Monthly$9.991 Month
Show 3 more
  • Casual Yearly$18.991 Year
  • Advanced Yearly$47.991 Year
  • Power Yearly$95.991 Year
2 purchases

Sightlines

Subscriptions2
  • Sightlines Pro Monthly$2.991 Month
  • Sightlines Pro Yearly$19.991 Year

Questions

Is BookFusion free?
BookFusion is free to download, with in-app purchases available.
Is Sightlines free?
Sightlines is free to download, with in-app purchases available.
Do BookFusion or Sightlines have ads?
Neither BookFusion nor Sightlines shows ads.
Which is updated more often, BookFusion or Sightlines?
BookFusion ships an update every 10 days, and Sightlines every 4 days. Most recently, BookFusion was updated on October 22, 2026 and Sightlines on October 20, 2026.

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