Welcome to CLZ!

CLZ is THE collection database software!

Easily catalog your comics, movies, video games, music or books.

Work on your phone or computer and sync data between them.

Reviews from CLZ users

Nov 16, 2024
Why did I wait so long?
After two decades of a tiny scribbled notebook, and another decade using the Notes app on my phone to keep track of my comic book runs, I finally decided to make the switch to using an app to help me with my 5000+ issue (and growing) collection.
COULD.NOT.BE.HAPPIER.
CLZ was the answer, all along. Literally days after I installed the trial, I received an email, asking how I liked it, but more importantly, asking for suggestions for ways to improve the app. That blew me away. I have loved every day with this app since, and cannot recommend it enough.
TheBadTrip (USA) on CLZ Comics Mobile
Nov 28, 2024
The best customer service in the world!
You guys are the best customer service in the world! I love all your apps and of course still use Books, Movies and will soon use the LP/CDs apps as soon as I have to time start adding my music to the apps!
Roger (USA)
Nov 27, 2024
To the rescue
Many thanks for the re-set. Everything seems to be working fine now.
I must stress how much I always appreciate the speed and efficiency with which you and Sytske come to the rescue. It really does matter!
Graham (United Kingdom)
Nov 21, 2024
Enjoy this software
I enjoy this software and it really helps when I see things on sale in stores to be able to check and see if I already own it.
Alan (USA)
Nov 15, 2024
Excellent database
CLZ Music is an excellent database, but I shouldn't be surprised. I also have CLZ Movies and CLZ Books which are excellent databases for my films and books respectively. All of them get regularly saved to a cloud so if the worst happens and I can't open the CLZ version, I can go to the cloud and build another from there. If not, contact them for help which is helpful and will soon have you up and running again. I would say I have used these databases for more than 15 years now.
Karen Denmark
Nov 11, 2024
The Best Out there!
CLZ continues to produce winning apps, this one is no exception. Hands down the best way to keep organized and avoid duplicating a movie. Super easy to use to locate, add, or adjust your collection. Next up…action figures?
I’m so glad to be connected to the company and also it’s worth noting they are VERY responsive to the collecting community…they truly care!
Russ1850 (USA)
Nov 7, 2024
My libraries organized
Thanks for making such programs, they really help keep music, movies and book libraries organized.
Errol Hunt (USA)
Oct 24, 2024
Amazing
Really appreciate your amazing customer service.
Maryann C. (United Kingdom)
Oct 20, 2024
5 stars!
Great app. Very helpful and great support. This is the premier way to track and value your collection.
Donald Riley
Oct 18, 2024
High level of customer service
I wanted to thank you very much for the credit you have issued to me and the clarification of what I should be purchasing in the future. If all companies had the same high level of customer service as Collectorz we would be a lot better off.
Larry F. (USA)
Oct 14, 2024
Great app!
Great app with stellar customer service.
GamingCritic955 (USA)

Latest CLZ news


A small update to the Adding by Barcode section of the Add Comics screen. Under the “Barcode” tab, there now are now two sub-tabs

  • Scan Barcode: scan barcodes using your device camera
  • Type Barcode: type barcodes or use external scanner

Basically, the ability to manually type in barcodes has been moved to its own sub-tab. This way, you can do manual entry of multiple barcodes in a row, without having to tap the keyboard icon each time to pop up the entry screen.

Another advantage of the new set-up is that it now fully supports scanning barcodes with an external USB or bluetooth scanner!


It’s the most wonderful time of the year, New Comic Book Day is here!

Let’s kick off with an all-new Venom in #1 of the very originally titled new Marvel series All-New Venom! The BIG question in this action-packed issue of course is, WHO exactly is hiding under the mask??

More mysteries await us in Dynamite Entertainment’s Thundercats: Apex and it appears this action-packed one-shot has all the ingredients for a wild-west themed adventure! We have the desolate desert landscape, the mysterious stranger ánd plenty of bandits for Apex to defeat!

Last but not least we join Robin, Zatanna and Agios Nikolaus AKA the one and only Santa Claus for a cosy gathering at the Wintersgate Manor. Their mission? Finding the missing Justice League… and eating and drinking as much as possible of course, judging from that beautiful Bernard Chang regular cover. You can read it ALL in #2 of Batman / Santa Claus: Silent Knight Returns.

Happy Reading!

BTW: how do you like today’s HUGE CLZ Comics 10.0 update?
You can now add comics by simply taking a picture of the cover!!!
Check out some screenshot and a demo video here.

Read more

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CLZ Comics Mobile

v10.0: Add Comics by scanning the cover!

Dec 04, 2024

Version 10.0 is here, with one HUGE new feature:
Add Comics by just scanning the cover!

No need to scan barcodes, no need to search by series title.
Just take a picture of your book and the app will recognize it!

Read more

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CLZ Comics Mobile

NCBD: Most wanted comics for week 49

Dec 02, 2024

These top-10s are created by you all, the users of the CLZ app and software, as they’re based on how often these comics already appear on your wish lists in the CLZ Cloud, even before release!

Read more


Closing in on the end of a productive year! This is CLZ Alwin, with the CLZ News for November 2024.

Big updates all over the place. The huge v10.0 update for the CLZ Books mobile app is live now (read ISBNs with OCR!). An even bigger v10.0 for CLZ Comics Mobile is coming up very soon now (add comics by scanning the cover!).

On the CLZ Web front, a long running project is getting closer to release. All 5 CLZ Web editions are getting a completely make-over for their Add screens, with the biggest impact on the game and movie editions.

The CLZ News for November 2024:

  • Now live:
    • CLZ Books 10.0: Read ISBN numbers with OCR
  • Coming up:
    • Coming soon, CLZ Comics v10.0 : Add Comics by scanning the cover
    • Coming soon: big updates for the Add screens of all CLZ Web editions
  • CLZ Core updates:
    • Core for Movies: “Check Covers” project, 86% cloud coverage!
    • Core for Comics: New Comic Book Day summary, 2,107 new releases

Read more


As we announced on our social channels earlier, CLZ Comics v10.0 is coming soon. And today, we can finally reveal what the big v10 feature will be:

Adding Comics by scanning the cover!

In version 10, we are introducing a new way to find comics in our CLZ Core and then add them.

  • No need to scan the barcode
  • No need to type series title or issue number
  • Just take a picture of the cover and bam!
    The app will show the matching comics from our Core!

Read more


November is almost coming to an end, but not before we celebrate one more New Comic Book Day!

This time we take a deep dive into the world of the Hulk family in #19 of The Incredible Hulk, Vol. 4. Expect 64 pages of bone-crushing action!

Over at DC Comics we join The Justice League in their ongoing battle with evil. We travel to space, we visit the Watchtower, we fight some baddies and maybe, just maybe, we will meet some very familiar faces along the way in #1 of Justice League Unlimited, Vol. 2.

In #4 of Teenage Mutant Ninja Turtles, Vol. 6 Donatello finds himself trapped in a zoo where he’s forced to fight other combatants for the sheer entertainment of others. I bet you will have a shell of a time with this particular issue!

Happy Reading!

BTW: In today’s NCBD report, we introduce a new section “CLZ Staff Picks, featuring our content team’s favorite new releases.
This section replaces the Most Variants section, as that was becoming less interesting, with the same series reappearing as the “winner” every few weeks.

Read more

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CLZ Comics Mobile

Getting closer: CLZ Comics v10.0!

Nov 26, 2024

At the moment, we are finalizing the UI/UX for the BIG new v10.0 feature and doing more testing, testing and testing.

Superman below has already spotted the new feature.
He says it is “inside the Add Comics screen” !!!

What do you think? What will be the big new v10 feature?
Let us know your guesses:

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CLZ Comics Mobile

NCBD: Most wanted comics for week 48

Nov 25, 2024

These top-10s are created by you all, the users of the CLZ app and software, as they’re based on how often these comics already appear on your wish lists in the CLZ Cloud, even before release!

Read more

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CLZ Comics Mobile

Coming soon: CLZ Comics v10.0!

Nov 21, 2024

The CLZ developer team (Sven, Pim, Bernard and AJ) is currently working on a major v10.0 upgrade for your CLZ Comics mobile app. Early versions are already being tested by AJ, Justin and Taco.

ETA still unknown, but my best guess is “within 2 weeks”.

This update will bring ONE huge new feature, something that currently is THE number one request from our users.

Can you guess what the big new feature will be?
Let us know your guesses: