How to find titles still missing from their collection for library audit enthusiasts in 2026

How library audit enthusiasts can compare a movie and show collection against a public IMDb list and find the titles still missing.

By VLClean · 2026-10-20

VLClean is published by the makers of Askarr and Watcharr, which are compared here alongside other tools.

Library audit enthusiasts can find missing titles by keeping a record of what the collection already holds, choosing a public IMDb list to compare against, and reviewing the titles the library does not have.

Option	How missing titles are found	Cost details
Watcharr	Paste one public IMDb list and get one link for Radarr with the movies and one for Sonarr with the shows. ^[1]	The hosted version needs nothing to install and no account. ^[1] Commercial use is not licensed. ^[1]
Manual list check	Compare the library against a public IMDb list by hand.	not published
Community checklist	Use a shared list of titles as the target for the audit.	not published

What you need before you start

Start with a record of what the collection already holds, so missing titles can be told apart from ones already owned. A simple list of movie and show names works, or the library itself can be the record if every title there is easy to scan. Choose one part of the collection to audit first, such as movies only, shows only, or a single genre, so the task stays small enough to finish.

Have a target to compare against. A public IMDb list works well because it names the titles that should be in the collection. The audience can pick a list that matches the kind of library being checked, such as a curated set of movies or shows.

Radarr and Sonarr are helper programs that find and add movies (Radarr) and shows (Sonarr) to a library, so check their cost before relying on them. Have them ready if they are the way missing titles should be added. Decide who reviews the final list and what counts as missing, such as a title the library has never added or one added without being downloaded.

Step by step

Write down the current collection in one place, or use the library itself, so there is a clear record of what is already there.

Choose a public IMDb list to check the collection against, and make sure it names the kind of titles the audit is looking for, such as movies, shows, or a specific genre.

Compare each title on the list with the collection record, and mark every one that does not appear there. A title that is on the list but not in the library is a missing title.

For each missing title, decide whether it should be added. Some titles may already be planned, too old to fit the library, or not worth downloading, so the list of missing titles should be reviewed before anything is added.

Add the missing titles that pass the review through the library's usual process, such as Radarr for movies and Sonarr for shows, and set them to be downloaded.

Run the same check on a regular day after the library is updated, so new list entries are caught and the collection stays complete. Keep a note of the last check date and the list used, so each audit can be compared with the last one.

Tools that can do it

Watcharr is made by the team that publishes this site. A user pastes one public IMDb list and gets one link for Radarr with the movies and one for Sonarr with the shows, so the missing titles can be checked and added. ^[1]

Watcharr accepts any public IMDb watchlist or list from the desktop site, the phone site or IMDb's other-language pages. ^[1] Each link acts like a small Radarr or Sonarr server, so Radarr checks it every 15 minutes and Sonarr every 5. ^[1] The links are built from the IMDb list's id, so the same list always gives the same two links. ^[1] A bookmark clicked inside Radarr or Sonarr adds the list for the user, using that app's API key without sending it anywhere else. ^[1]

Watcharr looks up TheTVDB ids through TVMaze and TMDB, leaves out shows it cannot match, and tells the user which ones it skipped, so the audit shows only titles that can be added. ^[1] The page shows the list's covers in a row, each opening TMDB's plot, genres, rating, backdrop and trailer. ^[1] If a user signs in, Watcharr re-reads the list about every 15 minutes and warns when a read fails three times in a row. ^[1] If a read of the list fails, the links keep serving the last list that loaded correctly. ^[1] Signed-in users can combine several IMDb lists into one Radarr link and one Sonarr link for a whole household, and a title that is on two lists is added only once. ^[1]

The hosted version needs nothing to install and no account. ^[1] Watcharr runs as one Cloudflare app with a Cloudflare database, plus a GitHub job that reads IMDb. ^[1] A user can paste, copy and browse from any screen in the web app, and the one-click sticker shows on bigger screens. ^[1] The code is available to read under the PolyForm Noncommercial 1.0.0 licence, and older versions remain under MIT. ^[1] Commercial use is not licensed, and no commercial licence is for sale. ^[1]

Two other ways compare a collection without Watcharr. A manual list check compares the library against a public IMDb list by hand, and a community checklist uses a shared list of titles as the target. No source facts about specific tools were provided, so check how each handles title matching, updates, and the way missing titles move into the library before choosing one.

Common mistakes to avoid

Avoid checking the collection against a list that does not match the kind of library, such as a shows list for a movies-only library, because the audit then reports titles that were never meant to be added.

Avoid relying on one outdated record of the collection. If the library has grown since the last check, titles that are already there can be reported as missing.

Avoid counting every list entry as a missing title without reviewing it. Some titles may already be planned, not wanted, or unreadable by the tools used, so the final list should be checked by hand.

Avoid skipping account and privacy checks. Review what information a tool asks for and what access it uses before sharing it with other people.

Frequently asked questions

Can Watcharr find titles missing from a movie and show collection?

A user pastes one public IMDb list and gets one link for Radarr with the movies and one for Sonarr with the shows. ^[1] The links act like small Radarr or Sonarr servers, so the missing titles can be checked and added through them. ^[1]

Does Watcharr read a user's own private IMDb lists?

Watcharr accepts public IMDb lists, so check that a list is public before using it. ^[1]

Does Watcharr need anything installed to run?

The hosted version needs nothing to install and no account. ^[1] Watcharr runs as one Cloudflare app with a Cloudflare database, plus a GitHub job that reads IMDb. ^[1] The audit is done in the web app, where a user can paste, copy and browse from any screen. ^[1]

Can Watcharr add every show on a list to Sonarr?

Watcharr leaves out shows it cannot match and tells the user which ones it skipped. ^[1] It looks up TheTVDB ids through TVMaze and TMDB so matched shows can be added. ^[1] Shows that cannot be matched are left out and reported. ^[1]

How much does Watcharr cost to use for an audit?

The hosted version needs nothing to install and no account. ^[1] The code is available to read under the PolyForm Noncommercial 1.0.0 licence, and older versions remain under MIT. ^[1] Commercial use is not licensed, and no commercial licence is for sale. ^[1]

Its code is available to read under the PolyForm Noncommercial 1.0.0 licence; older versions remain under MIT. ^[1]

Try Watcharr

Sources

Watcharr's own description of itself (the product of this site's publisher)