FAQ — frequently asked questions
+What is NumiStack?
A digital catalogue for coin collectors: you keep collections, describe coins (over 30 numismatic parameters), add obverse and reverse photos, track the value of your holdings and a wishlist of coins you are looking for.
+How does the AI scanner work and can I trust it?
You upload photos of a coin and the AI suggests an identification and a description. These are helper suggestions — always check them before saving. The AI does not confirm authenticity and does not replace an expert appraisal.
+What does the “completed” percentage on a collection tile mean?
It is the completeness of the collection: the share of coins you own out of all positions in the collection. Coins with the status “Wanted” are not counted. Example: 100 positions, 2 of them wanted = 98%.
+How do I mark a coin as wanted?
Set the status “Wanted” in the coin form, or select several coins on the list and use “Change status…”. By default they then go to the “Wanted” catalogue (you can turn this off in Settings).
+Can I import a coin from an auction listing?
Yes. In the add-coin window paste a link to the auction or use the browser bookmarklet from the import section — the data and photos are proposed to fill in the form.
+Who can see my coins?
Only you. Only when you share a coin or collection with a link can people who know the link see it without logging in. You can hide prices and location and withdraw the sharing at any time.
+How do I make a backup or move my data?
In Settings, in the “Backup” tab, you can download a full backup (JSON) and a coin list (CSV); the same JSON file is used to restore your data. PDF reports and printouts are available in the “Reports” tab.
+How do I delete my account?
Go to Settings → the “Session” tab → “Delete account” and confirm with your password. The account, collections, coins and photos are deleted permanently, so download a backup first. You can download a copy of your personal data in the same place.
+I forgot my password. What now?
On the login screen choose the password recovery option — we will send a link to your e-mail address to set a new one.
+I found a bug or have an idea. Where do I report it?
Open the reports tab (Bugtracker) in the app — describe the problem or suggestion and we will reply in the ticket.