Koob vs ChapterPals
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koob
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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/
ChapterPals
This app helps you track your reading progress and manage your book club. Organize your reading lists, log progress, and discover new books. It also facilitates book club discussions, voting on the next read, and tracking member progress.
- Track reading progress by page or percent
- Organize books into custom shelves
- Set and track reading goals
- Create and manage book clubs
- Vote on next book selections
- Chapter-based discussion threads
- Daily 'Guess the Book' puzzle
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Track every book you read, and keep your book club actually running. ChapterPals does both in one calm, friendly place. Most reading apps track books alone. Most club tools are a group text that slowly goes quiet. ChapterPals puts the two together, so the book you are reading and the people you are reading it with live side by side. TRACK YOUR READING Shelves for what you are reading, what you finished, and what you want to read next, plus custom shelves for anything else you want to keep. Log your progress by page or percent, rate books when you finish, and write reviews you will actually want to reread later. Set a reading goal and watch it fill in over the year. Already have a list somewhere else? Import it and pick up where you left off. Point your camera at a real bookshelf and ChapterPals will read the spines and find the titles, or scan a barcode to add a single book fast. Browse by genre, follow an author, or see a whole series in order. RUN YOUR BOOK CLUB Start a club in under a minute, or join one with an invite code from a friend. You can also browse public clubs by city, filter for in person or virtual, and search by the vibes you are after. Pick the next book together with a vote, so nobody has to be the one who decides. Set the night and the place, let everyone RSVP going, maybe or cannot make it, and add it to your calendar in a tap. See how far along everyone is, so nobody arrives half a book behind. Discussion threads stay organized by chapter, so you can talk about what you have read without spoiling what you have not. Stuck for something to say? Starter questions are ready when you need them. Every book your club has read together is kept as a history you can look back on. READ WITH FRIENDS Add pals and see what they are reading right now. Share a shelf, recommend a book straight to someone, and get a nudge when a friend finishes something you have been eyeing. AND A LITTLE FUN Guess the Book is a new puzzle every day. A blurred cover, five tries, and a fresh clue with every guess. Build a streak and compare notes with your club. Tier boards let you rank everything you have read exactly how you want, then share the result. ChapterPals is free to use, works on your phone and in your browser, and never sells your reading history. Reading is better with friends.
Screenshots
Verdict
The clearest difference is in-app purchases: ChapterPals at none against Koob's 6. ChapterPals also leads on ads (none vs shown) and update cadence (every 2 days vs monthly). On price, 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
Both are free to download. Koob sells 6 in-app purchases, starting at $4.99 per month. ChapterPals asks for nothing beyond the download.
Koob ships an update monthly, ChapterPals every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Koob | ChapterPals |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Monthly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.5 | 15.5 |
| Further details — not scored | ||
| Size | 88 MB | 55 MB |
| Age rating | 17+ | 9+ |
| Developer | Sebastian Jipa | Edward Buchholz |
In-app purchases
Koob
- Premium 1 Month$4.991 Month
- Premium 6 Months$24.996 Months
- Premium 12 Months$44.991 Year
- Mini$2.99
- Plus$6.99
- Max$14.99
ChapterPals
No in-app purchases









