Book Database Software

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.

It's a really nice app, i tried many in the past for catalog my books, i choosed that, I'm happy from many years now.

been using this for years. can store in cloud in case phone malfunctioning. currently have around 1000 books.

I have been using it for years. With pleasure. This app and desktop application are very well synced.Highly rwcommended.

This app is so easy to use and maintain and provides me with exactly the information, index and library of my books. Great app.

Just such an easy to use tool to make a virtual catalogue of your library.

I've used this app for a number of years; it has grown into a very extensive cataloging system, with easily searchable databases. my library includes hardcover, paperback, softcover books along with bound paper groups. I have several major topics- with Alwin's input, I've been able to sort the master list into various topics using "tags". The needed information was in the online manual, but I needed Alwin's help to figure my way thru. very patiently providing online help.

I initially purchased the Book Collectorz desktop software over 12 years ago. Since then my collection has grown to more than 1600 books. With the CLZ Books App I can have this wealth of information with me all the time. I find this App excellent value for the money paid and the Support Team very efficient whenever I had a question.

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

Bloody marvellous, well done sirs.

Now up to 2800 books and counting - a great bit of software backed up by readily accessible support. Congratulations.

This is my third book cataloguing app over the last 20 years, and it is hands down the best. Basically does everything you would want, but most importantly it is actively supported by a clearly dedicated team of developers. My previous apps all eventually withered because the developer(s) lost interest. CLZ seems to be an actively maintained app with frequent updates (the true test).
Highly recommended.

Makes keeping track of all reading so easy.

I have been using this app for many years and have not been disappointed. This app is constantly upgrading to make it easier to use with less work on my part and It is reasonably priced. I highly recommend this app.

I’ve been using this handy app for many years to keep track of my books that I’ve read and want to read. It has prevented me from buying a book that I’ve already read or have on my bookshelf (either a physical book or on my Kindle).
The developers are responsive to problems and suggestions for improvement. Bottom line: an invaluable resource for library management.

Excellent app has made cataloguing a 2500 book library a breeze.

Excellente application, pour 1€/mois, sans publicité, vraiment bien conçue. Ajout des livres (code- barres). Permet d’enregistrer facilement chaque livre (titre, auteur...) et d’organiser sa bibliothèque de façon claire et efficace. La prise en main demande un léger temps d’adaptation, mais l’utilisation devient ensuite très fluide. Utile quand on possède beaucoup d’ouvrages : on évite les doublons, on sait immédiatement ce que l’on a, et l'on choisit plus facilement sa prochaine lecture.

I use mainly to record titles I have read and those I wish to read or avoid. it includes basic bibliographical information as well as the option to add extras and notes. I wouldn't be without it.

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

couldn't live without it! it helps me keep track of all my books, which helps so I dont buy duplicates. it also picks random books if you shake it, which helps with my indecision. I especially love all the stats it gives you. I love that I can put my reviews and stars in it, too, not just on goodreads. I have had this for years now, and it's worth every penny.

I’ve been using CLZ for a while now and am slowly organizing my library with it’s help. Easy to use and allows me to put all the information from my library, both physical and digital into one place. Highly recommend.

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.

This app has saved a fortune by allowing me to check whether I have already bought it already.

I love this app. I use the comic collecting version as well. It keeps all your books in one place and is highly customisable. For instance I have a custom field which helps me keep track of what I’ve read, notes for what I thought about it and it just works flawlessly.
A great app for any bookworms out there!

I absolutely love this app and every other part that goes along with it. The price is amazing and the customer service is second to none. Never any problem whatsoever and it’s a pity I can only leave 5 stars because I would leave more if possible. A literal life changer if you are a book lover like me who likes to be super organised.

I stumbled across this app a number of years ago, and have been using it to catalogue my books, (and where they were in the house), keep track of what I wanted to purchase, and most importantly, keep me from purchasing the same book twice.
I have tried a number of other apps, and keep trying them, both free and paid, and nothing has quite hit the mark like this app does.

Great app for organizing book collections but also great team of developers. They constantly add features based on user requests and these have continued to make the app more useful.
Years ago they added the ability to include links in a listed which allowed me to catalog video content (demonstration videos) that we were rapidly creating during the pandemic.
A one-off use case but one which helped me address a problem quickly. Thanks

Very easy to use. Great features. Was a game changer in organizing the contents of bookshelves across rooms in my home.