Book Tracker・Reading Log vs KRIZ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Book Tracker・Reading Log
Easily build and manage your personal library by adding books via search, ISBN scan, or manual entry. Track reading progress, set goals, and record notes. Enjoy a private reading experience with data stored locally.
- Build personal library
- Add books by title, author, ISBN, or manual entry
- Track reading status (Want to Read, Reading, Read, Did Not Finish)
- Record ratings and notes
- Set yearly reading goals
- Built-in reading timer
- Private, local data storage
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Your private reading companion Build Your Library • Search by title or author and add a book in one tap. • Or scan its ISBN barcode, or type the details in yourself. • Want to Read · Reading · Read · Did Not Finish • Rating · Notes · Total pages Reach Your Goals • Set yearly targets and watch your progress grow. • Track reading sessions with a built-in timer. Private by Design • Your library, notes, and progress stay on your device. • No accounts required • Book search and ISBN lookup connect to Open Library. ISBN scanning, the reading timer, saved quotes, detailed charts and full backup require a subscription. Terms of Use: https://zeroplay.io/docs/legal/terms-of-service Privacy Policy: https://zeroplay.io/docs/legal/privacy-policy
KRIZ
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KRIZ is a reading diary, not another book catalogue. A catalogue answers “what have I read”. A diary answers “what happened to me while I was reading it”. KRIZ is about the second one. Three sections instead of lists Past, present, future. A book lives through them in turn, as it should. A diary you assemble yourself Quotes, thoughts, questions, observations, characters, things to explore after the book. Switch on only the blocks you need — the rest stays out of the way. Nothing is required: marking a book as finished is enough. Search your own words Remember the quote but not the book? A few words will find it. A book is added in a second By title, by author, or by scanning the barcode on the cover. What to read next The randomiser picks from the books you saved, from your shelf, or offers something new — from a selection of two thousand books with covers, descriptions and readers’ ratings. Cards for stories Eight ready-made looks. You tick what to show — cover, quote, rating, dates — and the app composes the card. Month summaries How much you read, what you liked most, which book turned out the longest. A fortune for the day One short line — a reason to open the diary even on a busy day. Import from Goodreads and StoryGraph Ratings, reviews, dates and shelves come across with the books. Free forever The whole diary: any number of books, entries and shelves. Search through your own words, barcode scanner, sync between devices, import, light and dark themes, story cards. What came free stays free. The KRIZ subscription adds Quote scanner: photograph a page, the text is recognised and you can fix it before saving. Voice notes. Photos for a book. Ambient sounds: rain, a library, a café. Every card template and extra appearances. The first seven days are free. Your entries are yours The diary lives on your phone and works offline. An account is only for syncing between devices — and it is optional. Backups are saved as an ordinary file. Ukrainian, Russian, English, Greek.
Screenshots
Verdict
The clearest difference is in-app purchases: KRIZ at none against Book Tracker・Reading Log's 2. KRIZ also leads on ads (none vs shown) and update cadence (fortnightly vs every 4 months). 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. Book Tracker・Reading Log sells 2 in-app purchases, starting at $4.99 per 7 days. KRIZ asks for nothing beyond the download.
Book Tracker・Reading Log ships an update every 4 months, KRIZ fortnightly. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.
| Parameter | Book Tracker・Reading Log | KRIZ |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 106 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | ZeroPlay Ltd. | Kateryna Dimitrashko |
In-app purchases
Book Tracker・Reading Log
- Weekly Pro3 Days trial$4.997 Days
- Monthly Pro3 Days trial$14.991 Month
KRIZ
No in-app purchases









