indexx vs 북크루
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
indexx
Capture, organize, and share impactful sentences from books. This app uses OCR to extract text from photos or allows manual entry, linking each quote to its source and your reflections. Create shareable quote cards and track your reading journey with a personal library.
- Capture sentences via OCR or manual entry
- Link quotes to book, page, and reflections
- Generate shareable quote cards
- Track reading progress and history
- Barcode scanner for book registration
- Personal sentence library
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Some sentences deserve more than a fleeting moment. indexx is a reading companion built for people who underline, dog-ear pages, and return to the words that changed how they think. CAPTURE SENTENCES THAT MATTER Photograph a book page and let OCR extract the text instantly. Or type it in yourself. Either way, every sentence you save is linked to its book, page number, and your personal reflection on why it mattered. TURN QUOTES INTO SHAREABLE CARDS Transform any saved sentence into a beautifully designed quote card. Choose colors, adjust layout, and share directly to Instagram, Messages, or anywhere you want. Make your reading visible. TRACK YOUR READING JOURNEY Add books by scanning their barcode or searching by title. Mark what you want to read, what you're reading now, and what you've finished. Rate, review, and see your reading history at a glance. YOUR PERSONAL SENTENCE LIBRARY Browse all your captured sentences in one place. Each one carries the book it came from, the page you found it on, and the thought you had when you read it. A timeline of your reading life, built one underline at a time. KEY FEATURES - Barcode scanner for instant book registration - Camera OCR to extract text from physical book pages - Beautiful quote card generator with multiple styles - Star ratings and personal reviews - Reading progress tracking with start and end dates - Stacked card and grid view for your bookshelf - Filter by time period: all time, this year, this month, this week - Private and offline — all data stays on your device indexx is for readers who believe the best part of a book isn't the cover — it's the sentence you can't stop thinking about.
북크루
This app helps you finish books by reading with friends. Set reading goals, track progress together, and schedule meetups based on your reading pace. Your reading history is saved as a virtual bookshelf.
- Read with friends
- Track reading progress
- Set reading goals
- Schedule meetups
- Virtual bookshelf
- Share quotes and notes
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친구랑 같이 읽고, 목표를 채우면, 만나는 날짜가 잡힙니다. 혼자였으면 못 끝냈을 책이 끝납니다. "우리 이거 같이 읽자" 해놓고 흐지부지된 책, 한 권씩은 있으실 겁니다. 북크루는 그 책이 끝까지 가게 만듭니다. ― 친구가 어디까지 읽었는지 한 화면에 모입니다 초대 한 번으로 크루가 만들어집니다. 각자 읽는 책이 표지로 뜨고, 진도는 나란히. 누가 어젯밤 몇 쪽을 넘겼는지 묻지 않아도 압니다. 옆 칸이 움직이는 게 보이면, 자기 전에 몇 쪽 더 넘기게 됩니다. ― 먼저 읽을지, 같이 채울지, 날짜에 맞출지 책만 정하고 끝내면 결국 각자 읽기가 됩니다. 그래서 크루를 만들 때 방식부터 정합니다. 같이 모으기. 크루원이 읽은 페이지를 전부 합쳐서, 합계가 목표에 닿으면 모임이 열립니다. 레이스. 같은 책을 놓고 먼저 다 읽은 사람이 1등. 약속한 날짜. 만날 날을 먼저 못 박으면 그날까지 하루에 몇 쪽씩 읽어야 하는지 앱이 역산해 알려줍니다. ― 목표를 채우면 약속까지 잡아줍니다 달성한 그 자리에서 날짜와 장소를 투표로 정하고, 정해진 일정은 폰 캘린더에 바로 들어갑니다. 단톡방에서 "언제 볼까" 하다가 흐지부지될 일이 없습니다. ― 읽은 흔적이 책꽂이로 남습니다 읽는 중인 책은 표지로 남고, 완독하면 책꽂이에 꽂힙니다. 하루도 거르지 않으면 연속 일수가 쌓이고 불꽃이 자랍니다. 한 시즌 지나면 그 책꽂이가 크루랑 같이 보낸 시간의 기록. ― 밑줄이 만나는 날의 이야깃거리가 됩니다 인상 깊은 구절과 메모를 크루원과 나눕니다. 바로 답하기 아까운 대목은 질문으로 남겨두었다가 만나는 날 꺼내면 그만. 카카오 또는 Apple 계정으로 로그인하면 바로 시작. 그 친구, 마지막으로 본 게 언제였더라. 책 한 권이 끝날 때마다 한 번씩 더 봅니다.
Screenshots
Verdict
The clearest difference is update cadence: 북크루 at every 4 days against indexx's every 3 months. 북크루 also leads on monetization model (free vs ad-supported) and iOS requirement (15.0 vs 26.0). On price, review sentiment, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
indexx ships an update every 3 months, 북크루 every 4 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | indexx | 북크루 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | OKMIN LEE | Seonwo You |
Customer experience
indexx
북크루
In-app purchases
indexx
No in-app purchases
북크루
No in-app purchases









