Haki TCG: scan One Piece cards and build your next deck

I built Haki TCG to bring the steps after opening a One Piece pack into one app: identify the cards, check the printings, record the copies and decide what belongs in a deck. It is available on iOS and Android.

Haki first launched on the App Store on January 30, 2026. I refreshed the screenshots in October 2026 and added a changelog of the work I completed that month below.

Scan a few cards

The useful starting point is a small pile of cards. Open the scanner, choose English or Japanese to match the cards in front of you, and select the collection that should receive them. Hold a card in view, then compare the suggested result with its number and artwork. When several printings look similar, that check matters before saving a copy.

Keep track of the copies

I think the collection is where scanning earns its place. A result needs somewhere to go. Haki keeps your saved copies and quantities together, while the scan session gives you a chance to review what you have just added. If there are two copies on the table, you can check that the collection records both.

Card details also bring available TCGplayer and Cardmarket prices into that workflow. Those are references for the selected printing, with source dates to check when comparing values. They help put a pull in context while you are looking through the collection.

Build your next deck

For playing, the deck builder lets you search for cards, assemble a list and see which cards you already own. You can export or share a deck list when you want to take it outside the app. Keeping that next step close to the collection is a practical part of Haki for me.

Get Haki TCG and try scanning a few cards into your first collection. Check the saved printings and quantities, then start a deck with the cards you want to play.