Comparison

Hardcover.app vs Koob

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

Head to head
About

Hardcover.app

This app helps you organize and discover books. Track what you've read, create custom lists, and see what friends are reading. Set reading goals and share your thoughts on books.

Highlights
  • Track read and to-read books
  • Organize with lists and tags
  • See friends' reading activity
  • Discover trending books
  • Rate and review books
  • Set reading goals
  • Track reading statistics
Features
Read full description

Hardcover is a book tracking app with a social side, built for readers, not algorithms. Add books you’ve read or want to read. Keep your library tidy with lists and tags. See what your friends are reading, explore trending picks, and discover hidden gems through curated lists. Rate, review, and share your thoughts. Make your profile public, private, or friends-only—your reading, your rules. Set goals, track your stats, and find your reading rhythm. We use Apple's standard Terms of Service (EULA). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Koob

Read full description

Koob is your home library, made digital. Put your real bookcases on your phone, collect your reading life in stamps and notes, and help build a book catalog made by readers. It all runs on your device, so it keeps working with no signal at all. YOUR SHELVES, MADE DIGITAL • Scan an ISBN barcode and the book lands on its shelf, with cover, author and details filled in automatically • Build bookcases and shelves that mirror your home: the office, the bedroom, the pile by the bed • Moving from Goodreads? Drop in your CSV export, we match your books by ISBN, and you shelve them with a live preview • Mark every book as To read, Reading, Read or Did not finish, and find any title at a glance • No signal on the metro, in the stacks or on a plane? Your shelves glow on. Browse, shelve, take notes and log your reading as always A READING LIFE YOU COLLECT • Your milestones are issued as stamps in a collector's album, one series to a page. Each series climbs from bronze through silver, gold and platinum to diamond, and you watch the next tier ink in as you read toward it • Every month you finish books in is bound into a volume you can keep • Keep the quotes and thoughts you want to remember, private to you • Set a yearly goal in books or pages, log your reading sessions, and see in your reading stats whether you're ahead or behind • Rate and review the books you finish READ WITH FRIENDS Add friends and start a reading challenge: race to the last page, read the same book together, guess the book from its cover, or solve a riddle hunt. A LIBRARY BUILT BY READERS Koob's catalog grows with the people who read from it. When a book is missing, add it: scan the spine, snap the cover, fill in what you know. Once a reviewer accepts it, it's in the catalog for good, and every reader who comes looking for it finds it because of you. That includes the local and older editions that are hard to find elsewhere. EARN TOKENS, SPEND THEM ON WHAT YOU NEED Accepted books earn tokens, with a bonus for a spine photo. Fix a typo, add a missing cover, complete an entry: accepted fixes earn tokens too. Prefer not to contribute? Watch an optional ad for free tokens every day. Spend them on Super Search, which digs past our shelves for rare editions and obscure printings, or on Koob+ months. FREE, WITH KOOB+ WHEN YOU WANT MORE Koob is free to use, with no forced ads: the only ads are optional ones you watch for free tokens. Koob+ adds: • Sync across all your devices, so the library you build on one is waiting on the next • A monthly token allowance for Super Search • Scanning a whole stack of books in one go • Special stamp series for your books, your genres and your bookcases • Unlimited private challenges with friends Every book you add helps the next reader. Start building with Koob. Terms of Use (EULA): https://ko-ob.ro/mobile/en/terms-and-conditions/ Privacy Policy: https://ko-ob.ro/mobile/en/privacy-policy/

Screenshots

Hardcover.app4 screens
Koob4 screens

Verdict

The call

The clearest difference is ads: Hardcover.app at none against Koob's shown. Koob's advantage is update cadence (every 2 months vs every 6 months). On price, in-app purchases, device support and iOS requirement 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. Hardcover.app sells 2 in-app purchases, starting at $4.99 per month and Koob sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Hardcover.app ships an update every 6 months, Koob every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Hardcover.app versus Koob: the parameters behind the verdict, then further details
ParameterHardcover.appKoob
PriceFreeFree
Rating4.2 (66 ratings) — better—
Positive reviews52.2% of reviews—
Number of ratings66 — better—
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.5
Further details — not scored
Size6 MB88 MB
Age rating12+17+
DeveloperHardcover LLCSebastian Jipa

In-app purchases

2 purchases

Hardcover.app

Subscriptions2
  • Supporter - Monthly$4.991 Month
  • Supporter - Yearly$49.991 Year
6 purchases

Koob

Subscriptions3
  • Premium 1 Month$4.991 Month
  • Premium 6 Months$24.996 Months
  • Premium 12 Months$44.991 Year
One-time3
  • Mini$2.99
  • Plus$6.99
  • Max$14.99

Questions

Is Hardcover.app free?
Hardcover.app is free to download, with in-app purchases available.
Is Koob free?
Koob is free to download, with in-app purchases available.
Do Hardcover.app or Koob have ads?
Koob shows ads; Hardcover.app does not.
Which is updated more often, Hardcover.app or Koob?
Hardcover.app ships an update every 6 months, and Koob every 2 months. Most recently, Hardcover.app was updated on October 27, 2026 and Koob on October 24, 2026.

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