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

Sep 22, 2025
Excellent quality
Wonderful, Sytske - you're a star. And thank you for always following through — I wish other companies did as you do.
There's no other book cataloguing software to compare with the excellent quality and standard of CLZ's. Moreover, the software development team often add enhancements and new additions to the platform (app and web) which are always helpful, and add to the scope of user benefits available: for example, the automated price update for books based on average prices for them in the online marketplace is invaluable for both book buyers and sellers.
Bobby (Cyprus) on CLZ Books Web
Oct 10, 2025
Phenomenal
It worked perfectly. Thank you so much for the help phenomenal customer service.
Josh (USA)
Oct 6, 2025
Merci beaucoup!
Thank you all so much for your help.
This is a wonderful service you have. Thank you thank you.
Judy (USA)
Oct 3, 2025
Your customer service is great
That looks like it fixed it! Thank you so much, your customer service is great, and quick!
I’ve been a customer and user for many years, and use all my databases daily! I’ve recommended them to many acquaintances over the years.
Anthony (USA)
Sep 26, 2025
The best
These are the best apps to do your cataloguing.
Pete M. (Canada)
Sep 24, 2025
The best out there!
Thank you so much!!! I did the renewal, and am VERY THANKFUL for the discount!!!
We LOVE the programs, and have been telling EVERYONE we know (and don’t know) to get them. They are amazing and are the best ones around for any type of collector!
Wendy (Canada)
Sep 22, 2025
Customer service
Thanks for the quick responses…. As always your customer service and response speed is second to none!
EK (Canada)
Sep 8, 2025
I really admire you and your team
It was a sleepless night, early in the morning hours, and I attempted to complete the purchase on my Android. PayPal decided that was the perfect opportunity to mess with me, and it wouldn't allow me to log on, change the password, etc. This morning I used my laptop, which is a much more generous and forgiving device, and all is resolved!
Don't get me wrong, and just for the record, I am not disparaging my smartphone (all hail our wondrous robot overlords)! Appreciate your concern, rapid follow-up, and friendly offer. I really admire you and your team, even the non-robots.
Have a great week ahead!
John B. (USA)
Sep 6, 2025
Thank you again for the help!
Thank you so much for all the help! Your team truly does an amazing job!
Fletcher S. (USA)
Sep 4, 2025
The best support/dev team
Hands-down the best app for keeping track of your comic collection, with the best and most helpful support/dev team!
Yehuda Rabinowitz
Sep 4, 2025
Excellent programs
"I've always gotten prompt and helpful responses whenever I've contacted you. I love your application.
M Berard (USA)

Latest CLZ news

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CLZ Games Mobile

v10.1: Automatic eBay search links

Oct 09, 2025

New in the CLZ Games mobile app today: the game details page now includes automatically generated eBay search links, that let you find eBay listings for that particular game.

These eBay links can be useful to:

  • easily get a feel for a game’s value, by finding its’ Completed/Sold listings on eBay.
  • easily find available copies on eBay (e.g. for your wish list items)

Read more


Everyday is New Comic Book Day when you buy them on a daily basis!

The Heart of Apokolips has transformed Earth into a hellscape in preparation for the return of Darkseid! The end of the DC Universe is here! DC K.O. #1 The Justice League’s only chance to defeat Darkseid is to enter a deadly tournament, an epic and over-the-top battle royale that will surprise you! The World’s Greatest Heroes fight to become the champion to enter the ring against Darkseid, but there’s a catch… the closer you get to the Heart of Apokolips, the more it corrupts you, changes you into something dangerous. Which DC character has what it takes to make it to the end? Who is willing to do what it takes to win it all, even if it means taking down their friends and family? You want to get nuts? Let’s get nuts!

The Amazing Spider-Man: Torn #1. Straczynski is teaming up with fan-favorite artist Pere Pérez (TVA, Venom War: Carnage) to tell a story that takes readers back to Peter Parker’s college days at Empire State University. Expect appearances from Gwen Stacy, Harry Osborn, MJ, and Flash Thompson — plus classic villains and an all-new threat that could shake the Marvel Universe to its core.

Little Nightmares: Descent to Nowhere #1 The world of the award-winning Little Nightmares as you’ve never seen it before! Hush, a timid mute girl awakes in a jail cell. Desperate to escape, she befriends another prisoner, Mono, who understands this world far better than her, they will have to find their way out of a very dark Dungeon. Elsewhere, Myra is a detective exhausted by life who meets someone who reignites her will to make a difference. They resume investigating unresolved cases of children vanishing year after year without a trace.

Happy Reading!

Read more

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CLZ Movies Mobile

v10.0.2: Fix for Pre-fill screen

Oct 08, 2025

Fixed:

  • Adding “Watched” to the Pre-fill popup crashed the app
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CLZ Movies Mobile

v10.0.2: Various fixes

Oct 04, 2025

Fixed for iOS:

  • Edit: Keyboard was placed over the Box Set Notes field
  • Details: Box Set Notes didn’t show correctly
  • Details: Formats without an icon didn’t show correctly as text
  • Sync: Box Set Purchase Date wasn’t syncing down correctly

New:

  • Statistics: Now has a line showing the total purchase price of both movies and box sets together
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CLZ Movies Mobile

v10.0.2: Various fixes

Oct 03, 2025

Fixed for Android:

  • Details: Dark Mode: Format icons didn’t show correctly
  • Details: Formats without an icon didn’t show correctly as text
  • Details: Links didn’t show when “Hide Trailers” was switched on
  • Details: Box Set Notes didn’t show correctly
  • List view: the Watched eye always showed as “not watched”
  • Sync: Box Set Purchase Date wasn’t syncing down correctly

New:

  • Statistics: Now has a line showing the total purchase price of both movies and box sets together

Check it out! It’s New Comic Book Day!

Without heroes… without protection… without restraint… there is only Absolute Evil #1
The emergence of superheroes has caught the attention of the world… and it’s certainly caught the attention of the people who run it. Ra’s al Ghul, Veronica Cale, Elenore Thawne, Hector Hammond, and the mysterious Joker have worked at cross-purposes until now, but this growing threat requires new ways of thinking… and new partnerships. An insidious betrayal from within their ranks is imminent, and if they don’t take action, they’ll lose control of a planet that was built to be their playground!

The return of Knull in: Venom #250. Venom and Mary Jane Watson are stuck with each other — and life just isn’t letting up. But at least things can’t get worse… can they? While the hits keep coming on Earth, the Cult of the Void gathers in the depths of space — and only one Skrull soldier knows their terrible secret. Knull has returned… and nowhere in the galaxy is safe. Join us as Venom celebrates it’s legacy 250th!

The Department of Truth celebrates its 5th Anniversary with an extra-length #0 Issue! The Department of Truth #0. A new day has dawned at the Department of Truth. Lee Harvey Oswald and his ruthless new recruits are ready to do whatever it takes to make the agency great again. Don’t miss this critical turning point in the Eisner-nominated series!

Happy Reading!

Read more


CLZ Alwin here, with the CLZ News for September 2025. I know, I am one day late. Yesterday was a bit too hectic with the big CLZ Movies releases, so I had to postpone the newsletter, sorry!

But yes, that immediately brings us to THE big news for September: the long awaited updates for CLZ Movies, but web and mobile, are finally live!
For Web, just log in to enjoy the new features, for the mobile app, update your app to version 10.0.

More Web news: a new feature had been added for all CLZ Web flavors, a new “Transfer Field Data” tool, which you can use for copying or moving data between fields.

And… at the end of this newsletter, I am doing a “What’s Cooking?” section again, that is, a quick summary of everything that is in progress at this very moment.
Which includes the disclosure of the secret project I announced last month, the biggest CLZ Web project in recent years. Don’t miss this big reveal!

In short, these are the topics today:

  • CLZ Movies: Lots of new fields and features! (web and mobile)
  • CLZ Web: New “Transfer Field Data” tool: copy or move data between fields
  • CLZ Music (web and mobile): improved results for barcode searches
  • What’s cooking? An overview of ongoing projects

Read more

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CLZ Movies Mobile

v10.0: Lots of new fields and features!

Oct 01, 2025

Most of the dev team (Pim, Bernard, Michiel and AJ) have been working on upcoming updates for CLZ Movies, both mobile and web.

And we can finally release both today.
Here’s what’s new for your CLZ Movies mobile app.

It started out as a relatively small update in which we would add some new fields (just like we did for the books and music apps recently). However, the update has grown into a huge major upgrade, with several big new features that have been on our “to do” list for many years.

  • Editable episode lists for TV Series
  • Watch history: track multiple watch dates for your movies
  • Add your own YouTube trailer links
  • Extra fields for Box Sets: Purchase Price/Date/Store and Notes
  • A new “Features” fields, to track available features for DVD/BR/4K
  • The HDR field now allows multiple values, e.g. HDR10 *and* Dolby Vision

Check out some screenshots below!

Read more

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CLZ Movies Web

Lots of new fields and features!

Sep 30, 2025

In the past 3 months, most of the dev team (Pim, Bernard, Michiel and AJ) have been working on big updates for CLZ Movies, both Web and Mobile.
And this update is now live for your CLZ Movies Web software!

It started out as a relatively small update in which we would add some new fields (just like we did for the books and music apps recently). However, the update has grown into a huge major upgrade, with several big new features that have been on our “to do” list for many years:

  • Editable episode lists for TV Series
  • Watch history: track multiple watch dates for your movies
  • Add your own YouTube trailer links
  • Extra fields for Box Sets: Purchase Price/Date/Store and Notes
  • A new “Features” fields, to track available features for DVD/BR/4K
  • The HDR field now allows multiple values, e.g. HDR10 *and* Dolby Vision

Check out some screenshots below!

Read more

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CLZ Books Mobile

v10.2.5: Fix for books getting unlinked

Sep 30, 2025

Fixed:

  • Adding a book without ISBN would cause it to get unlinked during syncing (which in turn could make it lose the cover)