Scan ISBN barcodes

I’ve used CLZ Books (and Music) for years. It’s the simplest way I’ve found to keep track of my collections. The camera driven ISBN scanner is brilliant. And in the rare case it doesn’t find the book I’m adding, the manual entry method is easy to use as well.
Don’t let ‘simple’ put you off though. The app allows you to filter as many ways as you can imagine. Its ability to track books series is excellent and extremely useful for me.
Highly recommended.

the scan functionnis excellent.

Easy to scan very efficient and reliable. The developers did great job and very helpful.

It's been perfect for managing my books, the only problem I have is finding the time to scan all of them. I had a weird issue with data being cached, but support were excellent and it's all sorted within about 3 hours.

Everything is going great. The ease of use is astonishing! All of my books, so far, have scanned in with no problem. It is truly a life saver for anyone wanting to catalog their book collection.

Awesome app I have scanned all my books and it’s so much easier to see what books I have.

Outstanding app. Scans isbn numbers with your camera and finds extremely obscure books!

I’ve been using CLZ Books (and its earlier desktop predecessors) for over twenty years, and it remains the gold standard for managing a serious home library. My collection now sits at nearly 4,000 volumes, almost entirely hardcovers, spread across multiple bookcases. CLZ has helped me keep everything meticulously organized—by author, genre, location, condition, purchase details, and more—without ever feeling overwhelmed.
The real game-changer has always been the mobile apps (iOS and Android). When I’m browsing in a bookstore or used bookshop, I can pull out my phone, scan the ISBN with the built-in camera scanner (which has an impressively high success rate), and instantly see whether I already own the title. No more accidental duplicates! That simple feature has saved me money and shelf space countless times over the decades.
What I appreciate most about the CLZ team is their ongoing commitment to improvement. They don’t just maintain the software—they actively listen to users and keep adding thoughtful features. The latest major update introduced individual Reading History tracking, which allows multiple read sessions per book with fields for Start/End Dates, Reading Status, Progress, and—best of all—a dedicated Reader field. My wife and I can now each log our own reading experiences on the same book entry (perfect for books we’ve both enjoyed at different times). Previously I relied on custom tags for this, which worked but felt clunky. The new system is far cleaner, more flexible, and syncs beautifully between the mobile apps and the web/desktop versions.
Beyond reading tracking, the app lets me customize almost everything: personal notes, ratings, locations in the house, purchase price and store, condition, and even custom fields for whatever unique details matter to me. Automatic cover art and core data (author, publisher, plot summary, genres, subjects) pull in reliably from their database, yet I can override anything if needed. Cloud sync keeps my entire collection backed up and accessible across devices, so I can update on my phone while traveling and refine everything on the big screen at home.
For anyone with a growing or already large collection—especially if you value accuracy, portability, and long-term reliability—CLZ Books is worth every penny of the subscription. The developers clearly care about bibliophiles like us, and after two decades, I’m still impressed by how much better it gets with each update. Highly recommended—whether you’re just starting to catalog or, like me, have been at it for years.
Rating: 5/5 Stars

I’ve used the CLZ Books app for over 5 years. Before this, my books were everywhere and I had a hard time finding them. I had a system using photos in my phone, but it was not very effective. CLZ allowed me to categorised the books by location, and was easy to upload using ISIN barcodes that could be scanned. Each time a book got identified, it included a wealth of information about the book and publication. Anyone who has over 100 books in their possession ought to use this app. Best thing is: they keep improving their offering.

There are a bunch of ways to sort and filter. I love the sound the scanner makes, it's very satisfying. It's great to have this since I like buying both online and in stores, I don't have to worry about ending up with duplicates.

I have been using CLZ Music for some years and have found it very useful. Now CLZ books seems just as good. I have several hundred (maybe a thousand?) books. Scanning bar codes or entering ISBN numbers makes entries easy. For some old books you need to enter the details manually and can photograph the cover to complete the entry. Details about the book and your opinion or whether it is in your ‘waiting to read queue’ can also be entered. Great app!

Books are added to the database by scanning the ISBN barcode. I find the location field particularly useful as I have books in various rooms. This is manually updated. The app is cross platform, Web. Windows and android so that your collection is always in synch across platforms

I love the app because you can have multiple collections and it is so easy to add books by scanning them in.

My husband and I are both voracious readers and have over 2000 books (including childrens books) we moved about 5 years ago and never really ‘organized them’ well. With this app we dont have to be organized! I can just click the bookshelf and which row the shelf is and now I can find my book so easily! Best app ever! Easy to scan them and set up shelves. Easy to search by title and author.

I’ve been using this product since before it was an app, and bought a bar code scanner for my PC. It’s just gotten better and better over the years. I own almost 5000 books, e-books and audio books, and I can check my inventory at any time from my devices, PC, or a browser.
Recently I decided to sell some of my business books, (I’ve retired), and the new pricing feature has been a huge help to determine which to keep, donate or sell. I also track books I loan, which ones I’ve read, where I got them, and where I put them (I have a lot of bookcases.)
In general I’m not an app fan, but this is the exception to that rule. The team are super friendly, send me quick personal emails when I have questions, have implemented suggestions, and continue to innovate. I couldn’t be happier with it.

Couldn’t be easier to use. Scanning the barcodes makes life so simple and it can even read the ISBN codes if there is no bar code. Integrates seamlessly with web version and syncs easily. Very, very pleased highly recommended.

Quick scans great options. Documented everything in about two hours.

This is the 3rd library app I've sampled and far and away the best! It scans the isbn number even if there's no barcode. It easily identifies the isbn inside a paragraph of words. This makes the job go so much more smoothly!

I have the movie app and I thought I would try the book app. It’s easy to use and sort. I love the fact I can scan to add. On my way to my own personal library.

UPDATE: 11/21/2025 Had an issue with book search and scan . Issue was resolved in a few days. Absolutely love this app. The entire CLZ team are the best. Easy to work with and they listen to dusty.
UPDATE: once again, Alwin and his team provide the best customer service available! I noted an issue and received an immediate (less than 2 minutes!) response. Naturally, he was right and I was wrong, oops. Keep your book collection neat and tidy everywhere you go.
CLZ Books has to be the best app available! The developers spend countless hours upgrading, improving and revising so that the end user experience is fantastic! I can think of no other app that I recommend so vigorously. Been using CLZ Books for two years now and have been pleasantly surprised. Top quality customer service. (This alone grants the developers 5 Stars) Inexpensive compared to other apps. They are continually interested in updating and improving this app for everyone. Easy to use and enter new books. There’s a space for almost everything and the final result will help you keep track of all your times. Many thanks.

I love this app! I was looking for something to track my home book collection. I tried over a dozen and this was by far the winner. Lots of great features, easy to navigate, and best of all the scanner is super fast, and didn’t require tons of adjustments to center or focus. It just works.
Support is fast, friendly, and helpful. As a kid, I dreamed of being a librarian so I guess this app is letting me live my dream.

We’re downsizing and have a lot of books to move on. CLZ Books is really easy to use, especially on books with an ISBN code, which it picks up really easily. Either my partner or I can scan and enter them, syncing through the cloud.
So far, very good!

I love my CLZ book catalog. I had always wanted to catalog my books and back in the days of card catalogs when I was young, I made an index card file (which I still have). I had far fewer books then. Now I have about 3,000, with book cases in almost every room of our house, and it is hard to keep track of them all in my head. So, one of the practical reasons for having a catalog is to record the location of each book by room and bookcase and in some cases even by shelf. I just have to remember, if I move a book, to change the location in the location field of my catalog. I have been able to locate books with my catalog instead of wasting time searching from room to room.
I have the mobile version as well, for several reasons. Sometimes when I’m in a bookstore, I am not sure whether I already bought a certain book or not; I can tell it is a title I would have liked to own, but I can’t remember if I actually bought it. At least twice I bought a book I already had. Now I can check my mobile catalog. When I finish reading a book, it is quicker to enter that on the “read” field on my phone than to remember to record it next time I am on my catalog on the computer. I can also stand in front of a bookcase with my phone and check whether all the books are cataloged and whether the location is correct.
Beyond practical reasons, I just love having my books organized and cataloged for mental clarity and the pleasure of looking at the titles and covers on the screen. I had once thought of making my own database of my book collection, but it wouldn’t have been nearly as sophisticated as the CLZ one and wouldn’t have included photos of the book covers. Some of my large categories, such as art books, children's books, and Christmas books, have beautiful colorful covers which are a pleasure to look through on the CLZ catalog. I used the genre field to make up my own categories, many of which are not actually genres but the subjects that are important to me. I love that the CLZ software keeps track of the numbers in each category, so for example I know that at the moment I have 184 art and design books, 248 architecture and interiors, 169 autobiography/memoirs, 102 tea books, 213 on England, 206 on New England, 235 children’s books, and 175 Christmas. It’s just interesting to me to know this. It’s a picture of my interests.

So far I have cataloged 2300 of my books. I really enjoy working on the catalog, but it takes time and not all of my books are easily accessible. My method is to scan my new books right away with the app on my phone that CLZ provides, then add them into the collection when I have time to sit at the computer. Then I go to the backlog of older books as I have time and add them in. Some of the oldest ones pre-date the ISBN system and take longer to enter manually. I realize it will take a long time until I am completely caught up, but it’s a goal I’m working towards. I have barely begun to catalog the e-books on my Kindle as that is not as high a priority but will eventually include them as well.
I’ve loved books all my life and also enjoy organizing (probably should have been a librarian), so making a catalog with the CLZ software is a great fit for me.
In the years I’ve been involved with the CLZ catalog, the software has consistently and vastly improved. Many of my books are rather obscure, but more and more of them are recognized in the enormous CLZ database and come in with many of the fields populated and with the cover photo. Previously I had to take my own photos of some of the book covers and upload them, and those photos don’t come out perfectly, but now most of the books come in with the cover when I enter the ISBN or can be found on the “search the internet” feature. More and more information about the books is now included, so that my catalog is an amazing resource.
The CLZ company is extremely responsive when I have contacted them with a question. I don’t know how large or small the company is, but I get a personal response to my emails. I feel confident that they will help me with any catalog questions, and I have a very positive view of the company.

I recommend CLZ Books Web and Mobile to anyone who wants to make a beautiful and useful book catalog. You will be able to sit and scroll through your library and remember books you might not have focused on for some time. You will be able to enjoy looking at the covers of the precious books you have collected and be happy you have them. You will feel organized and be able to locate books in your home. You will have fun with your catalog if you’re anything like me! I even told our local branch librarian about CLZ for his own book collection.

Just a note to say thanks very much for your wonderful tool. I was able to use it to easily and quickly catalog my mother's collection of scholarly scandinavian books. The cloud feature is wonderful, as I am now able to share the library with universities who are interesed in receiving the books. I had originally planned to use a spreadsheet and photos, uploading it to dropbox, but this is so much better.
Thank you so very much.

Love the barcode scanner. Brings up all the info about the book. if you have a big book collection try this app.

I helping a friend move & she is reducing her considerable library for the first time in 20 years. Over 500 books scanned by CLZ and easily tagged for keep, resell, & donation. So easy to use! The CLZ app makes all of that possible. I like the desktop version for modifying or editing any folders or books but quick fixes.

A great app to organize your books, especially if you own hundreds of them. The ISBN scan feature works wonderfully and helps to quickly bring in new books. Highly recommended.

I was assigned the task of cataloging my father’s library, a retired professor with over 3000 books. I have tried to use other apps and struggled. This app is a game changer and a life saver! It’s so easy to scan multiple items and finds titles quickly, it syncs with my computer, and I was able to create a print out to show my father the list with Book cover images! There is no other app like this one! Thank you for creating this!

CLZ Books is a powerful inventory app for serious book collectors, offering customizable cataloging, barcode scanning, and cloud backup. The interface is user-friendly, and customer support from the founder and owner Mr.Alwin is top-notch, though advanced features may require some learning.
Rating: 5/5
Recommended for: Dedicated collectors and libraries.

The clz team is so thoughtful and helpful, if you have any questions they are available! I have quite a large collection, and this app makes it so so so easy to log everything. their database is extensive, and the isbn scanner is magical! im so happy this app exists, I can stop buying doubles (sometimes triples) by searching my collection before I buy a book! its been so cool to see my collection grow!