Yes, sign in with your email and password above. Your library syncs instantly across any browser or device.

If you're signed in, your library is stored securely in the cloud and is permanent, no action on your device will affect it. If you're using the library as a guest without an account, your data lives in your browser's local storage. In that case, data is only lost if you explicitly clear browser storage or site data for 4kfilmdb.com, use a different browser or device, or browse in private/incognito mode. On iOS Safari specifically, guest storage may be cleared automatically after roughly 7 days of inactivity if the device is under storage pressure. Signing in is the only way to guarantee your library is never lost.

Owned means you have the disc in your physical or digital collection. Wanted is a wishlist state, for discs you're considering buying or tracking for future release. Adding a disc defaults to Owned. You can switch to Wanted from the disc's action panel, or search and add directly as Wanted from the library search bar.

Showcase marks discs you use to demonstrate your home cinema setup to guests, your personal demo reel. The Showcase Reel average score is calculated from these discs and shown in your stats. It's a vanity metric, but an honest one: it tells you how strong your best-looking discs actually are according to the reference scores.

Collection Avg shows the mean UHD Reference critic score across all discs you own, not your personal ratings. Once you log screenings, your weighted Personal Score average appears below it as "◈ X.X personal", calculated from your Viewing Profile weighting across all rated discs.

Blind Spots are discs in your Owned collection scoring 8.8 or higher that you have never marked as watched, excluding Digital copies. They represent your highest-quality unwatched physical discs. The card also surfaces your single highest-priority next watch: the top-scoring unwatched disc you own on 4K UHD or Blu-ray.

Upgrade Radar surfaces discs where you own the Blu-ray version but a 4K UHD release exists scoring 8.5 or higher. It's a direct signal that a meaningful quality upgrade is available and worth the investment. Set a disc's format to Blu-ray in its action panel to appear here.

After logging two or more screenings with personal video ratings, this card calculates the average gap between your scores and the critic consensus for the same discs. A +0.2 means you consistently rate transfers slightly higher than the aggregated reviewer scores. The insight then tells you what critic score effectively feels like Reference-grade to you personally, useful for calibrating which discs to prioritise buying.

Yes, every time you open a disc's panel and save a screening, it's added to the history. The three most recent screenings are shown. Your most recent rating is used as your current personal score. Deleting a screening reverts to the previous one, or clears your rating entirely if no history remains.

Yes. Use the Export CSV button in the header to download your full library as a spreadsheet. It includes title, year, status, format, UHD score, your personal rating and watch count. To import, click Import CSV and upload any CSV with a Title column. IMDb ID columns are detected automatically (including Letterboxd and IMDb watchlist exports) for more accurate matching. Titles not yet in the UHD Reference database will show as unmatched, you can review before confirming.

Your Rig stores your home cinema setup: display, player, processor (AVR) and speakers, along with your display capabilities and Viewing Profile. It automatically snapshots with every screening you log, so your history shows exactly what gear you were using when you rated each 4K disc.

When your video and audio ratings diverge by 0.2 or more, a blended Personal Score appears on the disc row. It's calculated from your Viewing Profile weighting. Videophile weights video at 80%, Reference at 65%, Audiophile at 40%. It only appears when the weighting is meaningfully changing your score, so if you see it, it's telling you something: your audio rating is pulling the disc up or down relative to your raw video score. Set your Viewing Profile in Your Rig.

Yes. Search for any title in the library search bar; if it isn't scored yet, you'll see a "Request a score" prompt. Submit the title and we'll evaluate it. If you're signed in, you'll be notified automatically when it's published. If you're browsing as a guest, leave your email to receive the notification.

Collection quality over time · Rescore alerts when a Wanted or Owned disc gets a meaningful score update · Upgrade Radar notifications when a new 4K release scores above your threshold · Multiple rig profiles for users with more than one setup.