Grailkeep
Scan, catalog and price an amiibo collection
Tap a figure to your iPhone and it names itself. Sweep a stack of cards with the camera. Find out what the pile is worth — and what you should never put in a bulk lot.
Coming soon to the App Store
Tap a figure, get its name
Hold an amiibo to the back of your iPhone and it identifies itself instantly from the tag — no typing, no guessing between repaints.
Sweep a stack of cards
Point the camera at fanned-out cards and they're read as they come into view, so a shoebox of Animal Crossing cards doesn't take an evening.
Know what's actually rare
Every amiibo carries a scarcity tier with the reason behind it — retailer exclusive, promo-only, region-locked — so you know what not to bulk-lot.
See what it's worth
Price estimates by condition, researched from completed sales, with the sample size and date shown so you can judge the number yourself.
Sort out what to sell
Grailkeep splits your pile into what deserves its own listing and what to bundle, then writes the title and description for each one.
Yours, and offline
The whole catalog ships inside the app. No account, no sign-in, no analytics, no servers — your collection never leaves your device.
Support
Questions, bugs, a missing amiibo, or a price that looks wrong? Email [email protected] and you'll reach the person who wrote the app.
Does scanning change or use up my amiibo?
No. Grailkeep only reads the identity bytes on the tag. It never writes to an amiibo, so scanning cannot affect a figure's data, its value, or anything stored on it by a game.
Does it work on iPad?
Mostly. iPads have no NFC, so tapping a figure is iPhone-only. Camera scanning, the catalog, your collection, rarity tiers and the sell plan all work on iPad.
What does Grailkeep Pro unlock?
Pro is a one-time purchase that unlocks collection value, per-condition price estimates, and the listing drafts. Scanning, cataloging, rarity flags and the sell plan's sorting are free — warning you off bulk-lotting a $300 figure shouldn't be behind a paywall.
Where do the prices come from?
Our own research into completed sales, bundled with the app and refreshed in updates. Each figure shows how many sales it was built from and when it was checked. They are estimates, not appraisals.
Is this made by Nintendo?
No. Grailkeep is an unofficial app for amiibo collectors and is not affiliated with, endorsed by, or sponsored by Nintendo. amiibo is a registered trademark of Nintendo.
Grailkeep is an unofficial app for amiibo collectors and is not affiliated with, endorsed by, or sponsored by Nintendo. amiibo is a registered trademark of Nintendo. Price estimates are research, not appraisals.