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Scan ISBN barcodes and create your own book database

Automatically catalog your books by scanning ISBNsGet author, title, publisher, genres, subjects & cover art.
Just search our huge online book database ... ... by scanning ISBN barcodes
Over 40 million ISBNs recognizedGuaranteed 97% success rate on your ISBN searches!
For your phone
  • Available for iOS and Android
  • Built-in camera barcode scanner
  • Sync data with the Movie Connect software
For your computer
  • For Windows, macOS, Linux, chromeOS, etc.
  • Use with the free CLZ Barry barcode scanner app
  • Sync data with the CLZ Movies mobile app

Or... use them both, as perfect companions!

Both CLZ Books and Book Connect can be used on their own, as a stand-alone solution. But these tools really come to life when used together, as they are great companions.
While away from your computer use CLZ Books on your phone, then use Book Connect at home, to work on your database on a big screen, with a real keyboard.
Of course, you can sync your database between them through our CLZ Cloud solution.

CLZ Books
1 year
+
Book Connect
1 year
USD $0.00
USD $0.00
save USD $0.00

Also still available: Book Collector for Windows

Book Collector is our legacy desktop software. Old-skool software that you install on your own computer, with your data stored locally.
Using Book Collector is only recommended for advanced Windows users, who know how to install/update software, manage folder and file permissions, configure firewall/security software, make their own backups, etc...

Learn more about Book Collector

Latest software updates

Thank you for allowing me to spin the pie chart at the bottom of the statistics page - 10/10 app, does as advertised, my only suggestion would be to add a more satisfying beep sound when you scan an isbn:) — Repulsive__ (Australia) on January 12, 2024

Reviews from customers

September 11, 2023
A serious time-saver!
It's a working quite well, thank you! I've managed to catalog over 160 books in just under 2 hours of time. With a collection exceeding 1500 books, this app is a serious time-saver! Out of these books so far, I've only found 3 needed a little extra love or manual attention. The barcode scanning is awesome! — Ron J. on CLZ Books
June 21, 2023
Great for keeping track of books
Barcode scanner fantastic. Good online database for manual search.
Update 6/23. Tech help prompt and responsive and App continues to be improved. Took 3 years to enter the thousands of books in our home library. Great having them at our fingertips. Now no second guessing about whether we've bought a book or read it before so, in addition to the unparalleled convenience our having the library on our phones we've saved more than it cost in not doubling up. — Barry Powell on CLZ Books
May 02, 2023
So easy
Scanning books is so easy! I was using a different app to track the books i own, but was having problems with it properly tracking them. This app is so easy to add and navigate! — Amanda Rosman on CLZ Books
April 25, 2023
Love Bookcollector!
You guys are SO AWSOME!! I LOVE both the app and online, though I am using the app most of the time now. It is wonderful to be able to scan in new boioks and and notes, edit, wherever I am! I am happy to support!
I have been a very satisfied customer for many years. It is so useful and fun! I never fall behind in keeping my new book purchases entered because with the phone app I can do it in 30 seconds or less!
I LOVE being able to scroll through my book library by viewing the covers! While reading a book, I can add personal notes for future reference and to make the book more searchable for me later ( like a note as to who recommended the book to me)
AND whenever I am having a conversation and want to tell someone about a book that is relevant, I quickly do a search of my collection ( on the app), even if I can’t remember the exact title or author, usually a key word is enough to find it.
Would you believe that my personal library is over 4,500 books? I would be overwhelmed without the Bookcollector products. It is so fun to have the info available right at my fingertips on my cellphone! And to know it is safely stored on the cloud. But even if you only have 100 books (or comics or music), I highly recommend CollectorZ. Truly a great value from a wonderful thoughtful supportive company with years of expert development! — Anita O. (USA) on Book Collector
October 26, 2022
Does the job
I’ve tried a few cataloguing apps and this combines the best of all of them. Very customisable with fast scanning via your phone’s camera.
When contacted the customer support is super fast and personal. — psmorrison (United Kingdom) on CLZ Books
October 25, 2022
Great program and service
I was using this app to catalog the 4000 books in my collection. After about 1000 bucks I upgraded to an iPhone 14. It turns out that the camera on the iPhone 14 will not properly scan the barcode. I contacted the developer and they immediately got back to me. They kept me informed of the progress of the upgrade. They have subsequently fixed the problem and the app works fine now.
The app itself is particularly useful if you have books published after 1967 - you can just scan the ISBN code. You have to manually enter the name of pre-ISBN books, but usually the database that the app is connected to will have some of the information. You can then incorporate that information into your collection database. — collector of books (USA) on CLZ Books
October 13, 2022
Good
ISBN code scanning works nicely, very helpful. — 34zwecke (Germany) on CLZ Books
June 10, 2022
Love the CLZ series of apps
I use this one for my books and the CLZ Games for my modern & retro games. I am happy to pay for premium of both just because the price is so reasonable and the apps are so good. Being able to add items by scanning the barcode with the camera on your phone is just awesome. Love it. — Shane Hurley (Ireland) on CLZ Books
April 28, 2022
Adding books is a breeze
Great app! Easy to use, clearly and cleanly laid out. Adding books is a breeze - just scan the barcode. I really like that my collection information syncs with and is backed up in the cloud. Customer service, on the rare occasions it is needed, is just excellent - I had a question to which the response was (1) polite, (2) really fast, and (3) really well and clearly explained. I am very, very pleased with this app and company. — Sean Alexander on CLZ Books
April 17, 2022
Simple and easy
I had another app that I was using to store my collections of books that I own to help me remember but it never added titles and that app disappeared from the App Store. I like this app because I get to just scan my books into it and it sorts it out in order for me and I don’t have to put any guesses whether I own a book or not when I’m out or online shopping I just check this app. Also way cheaper then other organizations apps. — Hhggttddkkffttbh (New Zealand) on CLZ Books
March 29, 2022
Excelente aplicación para catalogar tu colección de libros
Excelente aplicación para catalogar tu colección de libros. Valoro el hecho de que permita exportar e importar los datos (otras aplicaciones similares no lo permiten) y de esta manera poder utilizarlos a tu conveniencia. Excelente servicio de atención al cliente que supongo debe funcionar las 24 horas del día, pues me contestaron una duda por correo al poco rato y era en domingo. La búsqueda de los libros mediante escaneo de código de barras funciona muy bien. El único inconveniente, hasta ahora, es el precio. Funciona por suscripción mensual o anual y yo preferiría un pago único, aunque habrá que ver si las actualizaciones periódicas que prometen justifican ese sistema de negocio.
De momento, muy satisfecho. — David Laskowitz (Spain) on CLZ Books
January 18, 2022
This is your sign
If you're reading reviews to help you decide if you should splurge on the subscription - this is your sign - you absolutely should. Estimate how much time it would take you to manually catalogue your books & subtract the time it takes to just scan the barcodes of all your books. Multiple the remaining time by minimum wage (or your actual hourly rate). Is it more than $1.49/month in time saved? Do it. — Claire B on CLZ Books
January 12, 2022
New user happy
Just started using this app and the mixture of simplicity and complexity raises it above the competition. Now got to scan about 1000 more books! — DG_London (United Kingdom) on CLZ Books
January 08, 2022
Great range of features and tools
I've been using this app (and its Windows version) for a number of years and have found it excellent with a great range of features and tools. Adding books to the database is very easy either by manual entry or by scanning the barcode. Updates and improvements come through regularly at no additional cost. Customer service and help are also very good and very prompt. I highly recommend it. — Geoff Norridge (United Kingdom) on CLZ Books
December 16, 2021
Me gusta
El uso simultáneo con el mac y el iphone me da mucha flexibilidad, aunque es más completa la batería de datos del programa para mac. Sencillo de usar, el escaneo de isbn (hay algunos que aún no localiza) es de lo mejor para obtener datos rápidamente. — Lpf64 on CLZ Books
September 27, 2021
I love this app
We have a ginormous book collection and once I put the time and effort into organizing and scanning all of them, it has been so easy to look up what we have when out. Because of sharing the database, we both can refer to it too. Super easy to use, and we'll organized. We grabbed music version as well. — Nell Ruedin on CLZ Books
September 15, 2021
You are the best
I could not manage my collection without. I love the option to scan a book in the store and find out if I already own it. Happened a couple of times before I converted my collection to your program. — Frank Bernhardt (USA) on Book Collector
August 30, 2021
It works!
I just got this app and I love it! It was rocky setting up some of the books I have but didn’t check my email which had a welcome note with clear instructions on how to add books! I contacted customer service with some search questions and received a nice response very quickly. It’s not an automated reply! I even deleted a different book tracking app because this one is easier to use and faster! Feature I like are seeing books I own that are marked read or not read, the ease of scanning. and the folders for categorizing! Oh and the friendly customer service! Thank you! — LisNeal on CLZ Books
August 10, 2021
Great book catalogue
Love working with this app. Books can be entered by scanning their barcode, so it’s a powerful bookcataloguing system that’s very quick and easy to use. I make heavy use of options that allow you to personalize the settings and stored details, so it’s tailored to my needs.
Over the 7 years that I’ve used this app, I’ve seen lots of improvements. The developers are in-tune with their customers—if we ask for new functionality, it’s actually considered and often implemented. I even had the owner email me when I had an issue! — Kxt213 on CLZ Books
July 29, 2021
My collection at my finger tips
Just download this app today but I truly appreciate how functional it is. Let me preface this by saying I did purchase the sub so I have both the scanning and cloud storage. I estimate that I have nearly 1000 books in my vast collection and often can forget which series I might have missing book in. Now I can keep everything at my finger tips! — Mara Jenkins on CLZ Books
July 06, 2021
Fantastic app
Fantastic, books are entered so quickly, and if they can't be scanned they are easy to put in. — John Ess on CLZ Books
June 20, 2021
CLZ Books - Book Inventory
CLZ Books - Book Inventory
I have owned CLZ books for nearly ten years and could not be happier with it. It is worth every penny. The most convenient feature of the app is the bar code scanner. You can add books to your inventory or see if you already own a particular book. — proculus1 on CLZ Books
June 07, 2021
Great
Great app, finds 99.9% of the books I scan. — Brad Wallace on CLZ Books
June 02, 2021
Excellent app
An excellent app which is very sophisticated and powerful. A delight to use and Cloud synchronisation is a major asset as is the camera based ISBN scanning and adding feature. — John Pearson on CLZ Books
June 01, 2021
Very Handy!
If you are a book collector (a bibliophile!) then at a certain point you can’t keep an accurate track of your collection in your head. This becomes a problem when you are in a book store, you see something interesting and you really should know if you already have that book, or that particular edition or if the asking price is a bargain or too high. CLZ Books on the iPhone is a perfect way to keep track of not only what you have in your collection but also what is on your “want list” with lots of details. Using a book’s ISBN code, CLZ Books will fill in most of the critical data, including an image of the cover, and it is quite easy to add the missing pieces that are important to you (date of purchase, which bookstore, etc.). All this information sitting there sitting in your phone ready to be tapped into on a moment’s notice. I’ve been a CLZ customer for many years, starting when only a PC version was available. I didn’t choose their program lightly. It was just the best one available at the time. Their constant improvements and their expansion into the Mac world and then onto the iPhone has confirmed that my early adoption was valid and I still am a total fan of their app and believe that the price is a bargain for the product and the service. — jfair3 on CLZ Books
May 30, 2021
Fantastic software for bookaholics - and clubs
I have used the book cataloging software for many years to catalogue the many (many) books we have stored in numbered boxes and bags in our loft. I had also catalogued the books belonging to our local Embroidery group. We wanted to make full use of the group’s books during lockdown and with the superb help of the Collectorz support team, we set up a separate Library and included, on separate sheets, books belonging to members who were willing to loan them out. Until face-to-face meetings resume, we have an ad hoc doorstep delivery system in place, supported by the Loan facility within the software.
The CLZ Barry scanner enables members to scan the barcodes of books they are willing to loan and email the ISBN numbers directly from the App to our Librarian for logging. Subject to Covid restrictions, we can work directly with any member who has as many books as me, to load the books directly. It is particularly helpful to be able to sort on technique, subject etc as well as author and title.
The software works and the support team are easy to contact and really helpful. Highly recommended! — Teresa the embroiderer on CLZ Books
May 27, 2021
Perfect for Organizers!
I love to organize and as a homeschool mom I have nearly 1,000 books. Keeping them organized would be such a chore but this app makes it so easy! I love being able to scan the ISBN of a book to add it to my booklist. And pro tip: if you have lots of older books with no barcode, I’ve found the fastest way to enter them is to go to the keyboard for typing it in, and then click on my microphone and quickly say the numbers. Works great! — GoodHoll on CLZ Books
May 26, 2021
Works really well
This app really works. It is ez to input you data. I use the scan function. Well thought out and organized. — Peter Johnston on CLZ Books
May 25, 2021
Easy to use, great support
I looked at many other programs and found the book app superior to all the rest. It's four years later and I thought I would update what I thought about this app. I love the ability to scan your smartphone and have a transmitted to your desktop automatically. It's easy to use, keep track of your books in different forms and you can change the looks and the settings of how they are displayed. It's a great little app, easy to use with great support. Rates five — Wayne Dyche on CLZ Books
May 24, 2021
CLZ Fan
I’ve been using the CLZ Apps for several years. I started out with the Music Collection but soon after, I got the Books app and the Movies app. I have over 500 books in my collection and most of them added easily with the Author’s name or title. I read almost exclusively nowadays from Kindle, but I added paperback books easily with the scan function. Recently, I have been reading newer works that unknown authors self-publish on Kindle because they are a heck of a lot cheaper than top sellers list books. If they are not in the database, they are fairly easy to add to the collection with book covers and an overview of the book. It’s a great app which I use all the time as I read a couple of books a week. — GoodTimes60 on CLZ Books

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