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

Apr 1, 2025
Nothing but happy
It's an amazing app, and it truly finds everything. I've also been able to add home videos (also using the movie app), and it works really well. I'm nothing but happy with this fantastic app, especially for such a price.
Jean - Luc (Netherlands) on CLZ Games Mobile
Mar 26, 2025
Great all around
Fantastic stuff. App is well worth the price of upgrades. The app has only gotten better and better with each update. Recently had a issue with the app and customer support was super helpful in getting everything corrected very quickly.
EricFDH (USA)
Mar 4, 2025
Great Service
Great service!! Had an issue with my account and they were very quick to help and get it all sorted out! Great communication and very helpful.
tommy80! (USA)
Feb 28, 2025
Impressed
Thank you for your very prompt reply. I must say I have always been very impressed with the speed and utility of your company's response on the few occasions I have had a problem.
John M. (Australia)
Feb 27, 2025
Thank you!
CLZ is always so helpful and I recommend your product to all my friends!
New England Lace Group (USA)
Feb 14, 2025
Amazingly responsive
I appreciate your quick response and resolution. As usual you guys are amazingly responsive.
Lynne S. (USA)
Feb 2, 2025
The best at what they do
These guys are the best at what they do and are very quick to answer any issue a member has.
Patricia Coffman (USA)
Jan 31, 2025
The best on the market
You and your team are doing a great job hence these improvements continue to make your APP the best on the market.
Cheers to all of you.
Pete (Canada)
Jan 31, 2025
Awesomeness
This is great! Congratulations CLZ team, keep up the awesomeness.
Brandi L. (USA)
Jan 27, 2025
Loving your app
CLZ really is the best available, period.
Larry N. (USA)
Jan 15, 2025
Great for keep track
Very good app for what it does. If you're actively collecting great for keep track. Constantly upgrading also.
Honestly customer service has got to be the absolute best I've seen in a long time.
W Rock (USA)

Latest CLZ news

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CLZ Books Web

Automatic book values and retail prices

Apr 03, 2025

Live today: a huge update for the CLZ Books Web web-based software, with one big new feature:

Automatic book values

You can now get get values for your books from CLZ Core, based on average prices on various online used book stores. Values are automatically filled in when you Add Books from Core.

To get values for your existing books, use Update Values from the menu.
You can also use this, e.g. weekly, to get updates for the values.

Update Values in menu:

Update Values Report:

The book values are shown in the book details panel, near the top.

You can also add “Value” as a column in your list view and sort on it:

Finally, view value statistics and most valuable book lists in the Statistics screen:

Other changes:

  • The old “Current Value” field has been renamed to “My Value” and lets you either OVERRIDE the automatically provided value. Or just fill in a value for books that did not get an automatic value.
  • Get automatic retail prices in the Retail Price field (previously named “Cover Price”).
  • Optionally use the Retail Price as a “fallback value”, when an automatic Value is not available.
  • Sort your book list by Value

What to expect for your book collection?

First: with close to 40 million books in our CLZ Core database, we will not be able to provide a value for all books in your collection. In particular, books without ISBN will not get values, as our value system is purely based on ISBN lookups.

Currently, our Core and Cloud statistics show that CLZ Books users will get a value for around 83% of their books, on average.
Your mileage may vary of course. For example, if you own mostly mainstream US books with ISBN, your percentage may be closer to 90%. On the other hand, if you own mostly antique books, or only books in the Polish language, your coverage will probably be much lower.

The coverage of books with a value may slightly improve over time, as we are still gathering value information for less popular books.


It’s that time of the week again…NCBD!

Daredevil: Cold Day in Hell #1, written by Charles Soule and art by Steve McNiven. We get an old Matt Murdock, and his powers have faded to nothing. Matt will not, however, sit by and watch his fellow New Yorkers suffer, so instead of swinging around the city from his billy club line, he slings soup at a food center for the poor. But when a mysterious wrinkly old man interrupts a secret convoy causing an explosion, a deadly gas fills Hell’s Kitchen and this tale takes a turn that will change how you look at the Man Without Fear.

Thirteen years ago, Orin McCabe was a family man living a privileged life in the suburbs. Today, he’s condemned to death row for murdering his entire family in an unexpected fit of hammer-wielding brutality. In the aftermath of his heinous crime, it’s fallen to a trio of eclectic, but dedicated, ghost hunters—Jacob, the holy man; Holland, the skeptic; and their leader, Del, a true believer in the occult and worlds beyond—to surveil the abandoned McCabe home in search of proof for the existence of the undead . . . and whatever supernatural source may have possibly fueled McCabe’s inhuman massacre. But this ill-matched and uneasy squad of investigators is about to discover something much more terrifying than any ordinary spirit. . . . Something much more pernicious, much more contagious, that if not contained, could take full advantage of America’s unquenchable appetite for violence and deliver a plague of blood unto us all . . . Plague House #1. Written by Michael Conrad, Art by Dave Chisholm

He’s back! Brought to you by writer Ram V. and artist Butch Guice: Resurrection Man: Quantum Karma #1! Mitch Shelley, the Resurrection Man, has led thousands of lives and with each unexpected death and resurrection comes a new superpower. But after living a life to its natural conclusion, Mitch Shelly is awoken by a new purpose and power… saving the universe. Follow the Resurrection Man through time as he fights against a monster of his own creation: Gashadokuro — a sadistic WWII internment-camp commander who has inherited a twisted version of Shelley’s powers. The lines of cosmic order will begin to blur as no good deed goes unpunished. And whatever the cause, whatever the consequence, this much is true… he’s dying to save you!

Happy Reading!
Read more


We’ve all been there, at an LCS, or at a comic con… you wanna check CLZ Core and bam… no internet, no data, no nothing.
Sadly, there is nothing our tech guys can do to resolve that problem, there’s no app for that 🙁
UNLESS… we go offline, oldskool and back to PAPER!

Available today: CLZ Core in 12 leather bound books

  • Purchase this beautiful set of 12 leather bound books for just US $495!

    The full CLZ Core database, all series, all issues, all variants, in actual paper books for your offline browsing.

  • Keep track of your comic collection. All issues are listed with checkboxes, so just use a pencil to checkbox the issues you own.
  • Wanna stay up-to-date with all new releases? We’ve got you covered! Subscribe to the monthly “Update from Core” paperbacks, for only US $5.95 per month, or US $60 per year. Receive all NCBD releases in compact booklets, sent to you on a monthly basis.

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CLZ Comics Mobile

Week 14: Most wanted comics

Mar 31, 2025

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


This is CLZ Alwin, with another “what’s cooking” version of our CLZ Newsletter.
Again, with the entire content and dev team working on three big upcoming releases, the month of March saw no feature releases whatsoever.
We did do some important maintenance builds though.

So… this is what’s cooking:

  • Various maintenance updates for CLZ iOS and Android apps
  • Coming up: Automatic book values for CLZ Books Mobile and Web
  • Coming up: Toys-to-Life support for CLZ Games Mobile and Web
  • Coming up: More “compact” look and layout for CLZ Web
  • Available tomorrow: CLZ Core for Comics in 12 leather bound books!

Read more


Variant hunters, get ready! We’ve got a SPECTACULAR amount of NEW SERIES premiering this week.

Hush is back! Batman, Vol. 3 #158 – or rather Batman #158 Hush 2 – not only reintroduces us to iconic characters, but also gives us the art of Jim Lee, Hush’s original artist. Prepare for a mysterious and action-filled story.

Vampirella is back in Vampirella, Vol. 8 and she’s bringing her infant son. Little does she know she’s indirectly responsible for a nuclear inferno waiting to happen somewhere in the near future. In order to prevent this she receives help from somebody unexpected.

And if you can’t get enough of Deadpool, then you definitely can’t go wrong with Pooluminati.
We all know the Illuminati supposedly is a highly secret organization, protecting Earth from evil forces and threatening menaces. Throw in a mix of ‘Pools, and the Merc with A Mouth and his daughter Ellie themselves, and you get a heart-warming story. Artwork by Todd Nauck!

So get ready for this massive list with big-name releases and plenty of cover options, making it the BIGGEST week of the year so far!

Happy Reading!
Read more

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CLZ Comics Mobile

v10.2.3: Fix for new CovrPrice subscribers

Mar 24, 2025

Fixed an issue where new subscriptions to CovrPrice weren’t registering correctly for some users.

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CLZ Movies Mobile

v9.7.4: Fixed a crash in Pre-fill Settings

Mar 24, 2025

Fixed:

  • A crash in the Pre-fill Settings screen
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CLZ Comics Mobile

Week 13: Most wanted comics

Mar 24, 2025

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


Fixed:

  • Add comics/Check value: A freeze could occur after scanning multiple covers
  • A possible fix for the camera image looking “warped”