Comparison

Book vs Coil Reader

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

Head to head
About

Book

Features
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"β–  App Overview ""Where did I leave off in that book?"" ""I thought I had it, but did I sell it?"" A book lifecycle management app is here to resolve all such confusion. Book-Lifecycle-Manager goes beyond simple collection management. From the moment you think ""I want it"" until the time you ""let it go."" It records every aspect of your relationship with your books, allowing you to build your own library right in your pocket. β–  Do you have these concerns? Wondering ""Do I have this book?"" at the bookstore and ultimately regretting not buying it Forgetting how many volumes of a series you've bought and accidentally buying the same volume twice Unfinished books piling up, making it hard to track your reading progress Feeling frustrated because you can't remember the title of a book you sold long ago Tending to forget to return borrowed books Book-Lifecycle-Manager solves all of these problems! β–  5 Features of This App1. Status management covering a book's ""entire life"" You can meticulously manage books through 5 steps, from before acquisition to after letting them go.Before acquisition: List books you want or plan to read. Acquisition method: Clearly distinguish between books you bought and books you borrowed. Reading status: Unread, reading, finished. You can also record the number of pages progressed. Letting go: Keep a history of not only the books you own, but also those you've sold or lost. Nature: Manage both e-books and physical books together, regardless of the device.2. Overwhelming freedom of input You don't have to worry about ""recording being too tedious to continue.""The only required field is ""Title""! All other items (author, publisher, volume number, number of pages, purchase location, notes, rating, etc.) are optional. Depending on your style, you can choose between detailed input or quick notes.3. Intuitive tab-switching operation Equipped with dedicated tabs for each phase, such as ""Acquisition Status,"" ""Reading Status,"" and ""Disposed."" You can smoothly switch statuses with a single tap. 4. Never forget ""borrowed books"" or ""lost books"" It allows for the ""return management of borrowed books"" and the recording of ""former collections"" no longer in your possessionβ€”features that were difficult to find in existing apps. It leaves no cloud over your reading history. 5. Detailed reading notes and progress management Since you can record ""what page you are on now,"" it is safe even for those who read multiple books in parallel. You can leave plenty of thoughts and favorite phrases in the memo field.β–  Main Functions List Book registration/editing: Title (required), volume number, publisher, author, purchase location, total pages, pages read Status management: Acquisition status, acquisition method, reading status, disposal status, book nature (digital/paper) Category display: List display by status using tabs Rating/Comments: 5-star rating and free-form notes Lobby screen: An intuitive portal where information for the entire app is aggregated Recommended for: Avid readers and collectors who want to organize their bookshelves Those who want to clear their ""tsundoku"" (unread pile) and make reading a habit Those who use both e-books and physical books"

About

Coil Reader

Features
Read full description

Coil turns reading into something you watch. Words arrive one at a time, anchored at a single highlighted letter, so your eyes stay still and your reading speed climbs β€” 300, 500, 700 words per minute β€” without the line-hopping and re-reading that slows you down. Behind every word is a living sky that responds to the story. Tense passages darken. Wonder brightens. The atmosphere follows the writing, sentence by sentence. 70,000 FREE CLASSICS INCLUDED Dracula. Pride and Prejudice. Crime and Punishment. Sherlock Holmes. The Project Gutenberg library is built in and free to read. BUILT FOR FOCUS β€’ Adjustable speed, from a gentle pace to a full sprint β€’ Smart pacing that breathes at commas and rests at sentence ends β€’ Tap any word to hear it spoken β€’ Kids mode for early readers β€’ Reads beautifully in multiple languages, including right-to-left scripts PRIVATE BY DESIGN No accounts. No sign-up. No tracking. No ads. Your library lives on your device and works offline. COIL PREMIUM β€” one-time purchase, yours forever β€’ Import your own PDF, EPUB, and TXT books β€’ Speed-read news and RSS feeds from your favorite sites β€’ Additional atmospheres and visual layers No subscription. Ever.

Screenshots

Book4 screens
Coil Reader4 screens

Verdict

The call

The clearest difference is ads: Coil Reader at none against Book's shown. Coil Reader also leads on update cadence (every 11 days vs every 6 months). Book's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Book sells 1 one-off in-app purchase and Coil Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Book ships an update every 6 months, Coil Reader every 11 days. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.

Scorecard3 real differences Β· 3 level
Book versus Coil Reader: the parameters behind the verdict, then further details
ParameterBookCoil Reader
PriceFreeFree
Update frequencyEvery 6 monthsEvery 11 days β€” better
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.1 β€” better17.0
Further details β€” not scored
Size60 MB39 MB
Age rating4+4+
DeveloperTATSUO NAKANOInfinite Epiphany Inc.

In-app purchases

1 purchases

Book

One-time1
  • Remove Ads$5.99
1 purchases

Coil Reader

One-time1
  • Coil Premium$2.99

Questions

Is Book free?
Book is free to download, with in-app purchases available.
Is Coil Reader free?
Coil Reader is free to download, with in-app purchases available.
Do Book or Coil Reader have ads?
Book shows ads; Coil Reader does not.
Which is updated more often, Book or Coil Reader?
Book ships an update every 6 months, and Coil Reader every 11 days. Most recently, Book was updated on September 8, 2026 and Coil Reader on September 17, 2026.

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