Comparison

Ebook Central vs Underlined

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

Head to head
About

Ebook Central

Read downloaded ebooks from your library securely and accessibly, anytime and anywhere. This app offers a modern reading experience with streamlined authentication and an intuitive interface, syncing your progress across devices for uninterrupted research, even offline.

Highlights
  • Offline reading
  • Secure reading experience
  • Streamlined authentication
  • Intuitive interface
  • Cross-device syncing
  • Accessible reading
Features
Currently charting
Read full description

The Ebook Central Reader App makes it easier than ever to read ebooks from your library—anytime, anywhere. It features a secure, accessible and modern reading experience for downloaded Ebook Central titles, with streamlined authentication and an intuitive interface. Whether you’re catching up on reading between classes or on a flight to your next getaway, you can continue your research uninterrupted, even without an internet connection. The Ebook Central app syncs across desktop and mobile devices, making it easy to manage your reading and research when you’re on the go. It’s the perfect companion app to the Ebook Central online platform, which is used to search and select books for download. The Ebook Central app has robust security features to ensure library collections and users' privacy are protected. Download the Ebook Central app today and start researching your way.

About

Underlined

Features
Read full description

You underline as you read. Then the lines stay in the book, because typing one out is more work than it is worth in the moment. Underlined is a reading tracker built around getting them out. Photograph the page, draw a box round the passage, and it is yours. A PASSAGE WITHOUT TYPING IT • Photograph the page and draw a box round what you underlined. Nothing is retyped. • The box is coarse on purpose: it only has to contain the passage. The words are trimmed back to whole sentences, so a box that clips a few still gives a clean quotation. • The page number is read off the photograph, so keeping a line from page 214 moves your reading progress to 214. When it cannot be read, the app asks. • Text read off a page is never quietly corrected. A word that looks wrong is offered as a suggestion — against word lists carried on the phone, in twenty-six languages — and nothing changes until you say so. • Star the ones that matter. Add a thought underneath while it is still fresh. A SHELF IN ONE PHOTOGRAPH • Point the camera at a row of spines instead of typing forty titles. • Books standing up, books lying flat, a shelf shot at an angle, all without turning the picture. • A single cover works too, for the book in your hand. • Everything found is shown to you first. You choose which go on the shelf and which shelf. YOUR READING YEAR • One goal for the year, paced against how far into the year it actually is — not against a flat count. • Three shelves and no ceremony: want to read, reading, finished. Your TBR is just a shelf. • Keep the page you are on; the last page finishes the book on its own. • Write down how a book left you, in a sentence or two. • Statistics about reading, not about scores: passages kept this month, this year and all time; how many you starred; how long they run; books finished, by year. WHAT YOU KEEP COMES BACK • A passage resurfaces each day, from your own collection. • Search every line you ever kept, with your words marked where they were found. • The ones you return to rise: the app counts which passages you come back to. • Dig into a passage with a model that runs on your phone, never a server. (Recent iPhones.) • Read a passage in another language through Apple's own translation sheet. DISCOVER • Passages other readers underlined, narrowed by subject, in the languages you read. • Keep the ones that stay with you; they join your own shelf. • Find the book behind a line: what it is about, more by the author, books shelved beside it, and where to buy a copy. • Offer a passage of your own if you like — a button you press, never something the app does on its own. Anything can be reported and taken down. TAKE IT WITH YOU • Send a passage as a picture, set as a page rather than a screenshot. • Export one book's passages, or everything you have ever kept, as a PDF set at paperback size. YOUR LIBRARY STAYS YOURS • No account. Nothing to sign up for and nothing to sign in to. • Your books, your progress and your passages live on your phone. • The app does not upload your notes and it does not track you. • Eight languages in the app itself, and passages in twenty-six. • A colour for every book; paper by day, ink by night. FREE AND PRO Five books, free, with every feature working — the camera included. Keeping passages is free without limit and always will be: it is what the app is for. Underlined Pro opens the shelf to as many books as you keep. SUBSCRIPTION Underlined Pro is an auto-renewing subscription: $2.99 a month, or $19.99 a year. Payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless turned off at least 24 hours before the period ends; manage or cancel it in your Apple Account settings. Privacy policy: https://www.threedollarclub.com/underlined/privacy.html Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Discover passages come from Wikiquote, used under CC BY-SA 4.0. Book information comes from Open Library.

Screenshots

Ebook Central4 screens
Underlined4 screens

Verdict

The call

The clearest difference is in-app purchases: Ebook Central at none against Underlined's 2. Ebook Central also leads on chart position (#189 vs unranked) and device support (4 vs 1). Underlined's advantage is update cadence (fortnightly vs every 2 months). On price and ads 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. Underlined sells 2 in-app purchases, starting at $2.99 per month. Ebook Central asks for nothing beyond the download.

UpkeepUpdate frequency

Ebook Central ships an update every 2 months, Underlined fortnightly. Both last shipped on October 25, 2026.

Scorecard5 real differences · 6 level
Ebook Central versus Underlined: the parameters behind the verdict, then further details
ParameterEbook CentralUnderlined
PriceFreeFree
Rating1.5 (38 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings38 — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
Best chart rank#189 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS14.0 — better18.0
Further details — not scored
Size50 MB24 MB
Age rating4+4+
DeveloperClarivate Analytics (US) LLCMert Arman

In-app purchases

None

Ebook Central

No in-app purchases

2 purchases

Underlined

Subscriptions2
  • Underlined - Monthly$2.991 Month
  • Underlined - Yearly$19.991 Year

Questions

Is Ebook Central free?
Ebook Central is free to download, with no in-app purchases.
Is Underlined free?
Underlined is free to download, with in-app purchases available.
Do Ebook Central or Underlined have ads?
Neither Ebook Central nor Underlined shows ads.
Which is updated more often, Ebook Central or Underlined?
Ebook Central ships an update every 2 months, and Underlined fortnightly. Most recently, Ebook Central was updated on October 25, 2026 and Underlined on October 25, 2026.

Other comparisons