Comparison

Lectio PDF Reader & Bookshelf vs Throughline Speed Reader

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

Head to head
About

Lectio PDF Reader & Bookshelf

Features
Read full description

A PDF bookshelf for iPhone and iPad. Bring in PDFs from iCloud Drive, Google Drive, OneDrive, Dropbox or the Files app, and read them like books in two-page spreads. Made for you if • You want to read scanned books and comics on iPhone or iPad the way you read paper books • Your PDFs are spread across cloud services and you want them on one shelf • You read right-to-left books and want the spreads in the right order • You need to get back to that one page of a paper or document quickly Collect: put every PDF on one shelf From "Add PDF", bring in PDFs from any place that appears in the Files app, such as iCloud Drive, Google Drive, OneDrive and Dropbox. You can also add files by choosing them in the Files app, opening Lectio from the share sheet in another app, or dragging and dropping them. Install a document app such as Google Drive, and you can bring in its files through the Files app. The same PDF is never added twice, and password-protected PDFs can be added too. Books are kept on your device, so you can read them without a connection. Lectio only reads your cloud files and never changes or deletes them. Read: turn pages like a book Each book remembers two-page or single-page view, and left or right binding. Right-bound books lay out their spreads from right to left. Swipe or press the arrow keys to turn the page, and tap the page to hide the buttons. Lectio remembers where you stopped, so the next time you open a book you carry on from there. Find: contents, thumbnails and text search Jump to a chapter from the table of contents, or to any page from the thumbnail grid. Search the text of a book and each match is highlighted in yellow. In the library, find books by name. Organize: favorites, bookmarks and collections See your favorite books and bookmarked pages in lists. A bookmark keeps the opening words of its page, so you know where you left it. Sort books into collections of your own, and rename books as you like. Deleted books stay in Recently Deleted for 30 days, where you can bring them back. iPhone, iPad and iPhone Duo Lectio supports iPhone Duo. Read on the outer display when it is closed, and on the large inner display when you open it. The buttons sit in the vertical bar along the edge, out of the way of the page. Keyboard, remotes and VoiceOver Press ⌘F to search, ⌘B to bookmark and ⌘W to close. Pages turn with the arrow keys, so a Bluetooth keyboard or a page-turner remote that sends arrow keys works too. VoiceOver and Dark Mode are supported. You can also share and print your books. Start by tapping + in the library to add your first PDF.

About

Throughline Speed Reader

Enhance your reading speed and comprehension with intelligent pacing that adapts to natural language rhythms. This app presents text one word at a time, optimizing focus and reducing eye movement for a more efficient reading experience. It also offers AI-powered summaries and seamless integration across Apple devices.

Highlights
  • Adaptive word-by-word pacing
  • Optimal Recognition Point (ORP) alignment
  • AI-generated summaries with key takeaways
  • Safari extension for saving articles
  • Apple Watch app for reading on the go
  • Detailed reading analytics dashboard
  • Customizable fonts and interface
Features
Read full description

Read faster while comprehending more. Throughline presents text one word at a time with intelligent pacing that adapts to natural language rhythms. VARIABLE PACING ENGINE Unlike basic RSVP readers that show every word for the same duration, Throughline adjusts timing dynamically: • Punctuation creates natural pauses — longer at periods, brief at commas • Complex words get extra display time • Paragraph breaks give you time to absorb ideas • Not fixed-interval timing — pacing adapts continuously word by word ORP ALIGNMENT Each word displays with its Optimal Recognition Point at a fixed position on screen: • Your eyes never move — words come to you • The red pivot letter marks the optimal focus point • Eliminates the saccadic jumps that slow traditional reading • Find your ideal reading pace and keep pushing further WARMUP & COOLDOWN • Start each session at a comfortable pace • Gradually accelerate to your target speed • Cooldown ramp slows gently at the end of texts • Circular toolbar gauge shows ramp progress during warmup and cooldown • Configurable duration and intensity APPLE INTELLIGENCE • Generate summaries with key takeaways and topics • All processing happens on-device • No data sent to servers • Available on devices supporting Apple Intelligence READING MODES • Single Word: Classic RSVP with full focus • Reader: See surrounding context as you read • Double-tap to switch modes BROWSING PANEL • Open Browse as an inline drawer beside the minimap • Preview nearby paragraphs for context without leaving the reader • Jump to the section you want, then resume at speed SIRI & SHORTCUTS • Voice: "Read clipboard in Throughline" — speed read copied text • Voice: "Resume reading in Throughline" — pick up where you left off • Voice: "Reading stats in Throughline" — hear your stats hands-free • Shortcuts app: Build automations with Read Text, Read Clipboard, and more • Home Screen widgets show current reading progress • Lock Screen widgets with circular gauge, progress bar, or inline text • Widget accent color matches your reader theme SAFARI EXTENSION • Save articles to your reading queue directly from Safari • One tap — no copying or pasting needed • Works on iPhone, iPad, and Mac APPLE WATCH • Read articles on your wrist with intelligent pacing • Digital Crown adjusts reading speed with haptic steps • Articles under 3,000 words sync automatically • Session progress syncs back to iPhone • Watch face complications show your queue ANALYTICS DASHBOARD • Track words per minute over time • See total words read and sessions completed • Calculate time saved vs. average readers • Weekly activity visualization • View stats by week, month, year, or all time LIBRARY MANAGEMENT • Auto-save everything you read • Or read ephemerally with no storage • Two tabs: Reading (queue + in progress) and Archive • Sort by date, title, word count, or progress • Resume exactly where you left off CUSTOMIZABLE INTERFACE • Serif, sans-serif, and monospace fonts • Adjustable font sizes with Dynamic Type support • Custom pivot color selection • Multiple background themes • Rails and ORP indicator toggles THROUGHLINE PRO • Free tier includes the core reader, 3 fonts, 3 backgrounds, and 10 library items • Pro unlocks all fonts, colors, backgrounds, unlimited library, analytics, iCloud sync, Apple Watch, AI summaries, and advanced pacing controls • Monthly, annual, and lifetime plans available • Family Sharing supported DESIGNED FOR iOS • Native SwiftUI with modern toolbar design • Full VoiceOver accessibility • Respects Reduce Motion preferences • Dark mode throughout • iPad optimized PRIVACY FIRST • All reading happens on-device • No account required • No data transmitted • Your reading stays private Start reading faster today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Lectio PDF Reader & Bookshelf4 screens
Throughline Speed Reader4 screens

Verdict

The call

The clearest difference is in-app purchases: Lectio PDF Reader & Bookshelf at none against Throughline Speed Reader's 3. On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Throughline Speed Reader sells 3 in-app purchases, starting at $1.99 per month. Lectio PDF Reader & Bookshelf asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
Lectio PDF Reader & Bookshelf versus Throughline Speed Reader: the parameters behind the verdict, then further details
ParameterLectio PDF Reader & BookshelfThroughline Speed Reader
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS27.026.0 — better
Further details — not scored
Size31 MB15 MB
Age rating4+4+
Developercaps-rockSteven Townsend

In-app purchases

None

Lectio PDF Reader & Bookshelf

No in-app purchases

3 purchases

Throughline Speed Reader

Subscriptions2
  • Throughline Pro - Monthly$1.991 Month
  • Throughline Pro - Annual$12.991 Year
One-time1
  • Throughline Pro - Lifetime$29.99

Questions

Is Lectio PDF Reader & Bookshelf free?
Lectio PDF Reader & Bookshelf is free to download, with no in-app purchases.
Is Throughline Speed Reader free?
Throughline Speed Reader is free to download, with in-app purchases available.
Do Lectio PDF Reader & Bookshelf or Throughline Speed Reader have ads?
Neither Lectio PDF Reader & Bookshelf nor Throughline Speed Reader shows ads.
Which is updated more often, Lectio PDF Reader & Bookshelf or Throughline Speed Reader?
Lectio PDF Reader & Bookshelf ships an update every 6 weeks, and Throughline Speed Reader every 6 weeks. Most recently, Lectio PDF Reader & Bookshelf was updated on October 12, 2026 and Throughline Speed Reader on October 9, 2026.

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