Guide
A collection answers one question: what do you actually own? Almost everything else in HoloHoard is built on that answer, so it is worth two minutes to understand how collections work and where they end and lists begin.
Everything in a collection is a copy you actually have. That single rule is what makes the rest of the app trustworthy: your Est. Value is the value of real cards, your stats describe a real hoard, and the cards you offer for sale or trade are cards you can really hand over. If you want to track something you do not own yet, that is what a list is for, and nothing stops a card from being in both places.
Collections are tied to a single game, so your cards stay organized by franchise instead of turning into one undifferentiated pile. A free account gets a collection per game, which is all most collectors need. Premium removes the cap, so you can split a game into as many collections as you like: one per binder, one per set, one for the cards you keep at home and one for the ones in a deck box.
A card in your collection is not just a name and a number. Each copy can carry its own condition, grading company and grade, serial number, what you paid, private notes, and your own photos of the actual card. That matters because two copies of the same card are often worth very different amounts: a raw played copy and a graded gem-mint copy are separate records, not one line with a quantity of two. Ordinary duplicates still collapse into a tidy quantity, and serialised cards get one row per copy so every serial stays its own record. Read about graded cards.
Because a collection is an honest record of what you own, it can drive the rest of the app. You get a daily Est. Value for the whole collection and per card, set completion progress, and analytics on your Dashboard covering your most valuable cards, value by game and duplicates. It is also what makes for-sale and trade lists possible: those list types draw on the cards you own, which is why a card has to be in your collection before it can be offered. Read how value tracking works.
Every collection is private until you decide otherwise. Make one public and it gets a read-only page you can share with a single link: visitors can browse what you own but can never change it. Public collections can also appear on your collector profile, so one link introduces your whole hoard.
You can delete a collection from its Edit screen, or by swiping its row to the left in the app. This is permanent: the collection goes, and so does every copy in it, including any photos you uploaded to those cards. Your dashboard totals, collection value and set completion all drop accordingly, and if the collection was shared, its link stops working. We confirm first, and ask a second time when there are photos at stake, because card data can be re-added from the catalogue but your own photos cannot.
The short version: a collection is what you own, a list is what you want, what you would part with, or what you are building. Adding a card to a list never changes your collection counts, and removing a card from a list never removes it from your collection. Once that split is clear, every other rule in the app follows from it. Read how lists work.
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