Cardume

Cardume was born from a real pain point: managing group card trades and purchases via WhatsApp is chaotic.

Who owes what? What was the last trade? How much does each person pay for shipping?

With Cardume, all of this is organized in one place — within closed groups, based on trust between friends.

━━ SMART TRADES ━━
Register your trades and track the balance with each friend in real time. No mandatory confirmation — because among friends, a friend's word is their bond. But if you need to dispute, correct, or cancel a trade, you and your friend can do so at any time.

The best part: Cardume simplifies chain trades. Someone has what you want, you have what someone else wants, someone else has what someone else wants — the app shows you how to resolve everything at once, without losing anyone along the way.

━━ GROUP ORDERS ━━
Want to split the shipping cost of a group purchase? Create an order, each member adds what they want, and the app calculates how much each person owes. Simple as that.

━━ CLOSED GROUPS ━━
No strangers. You join by invitation and only trade with people you already know. The history of trades and orders is recorded for the entire group to follow.

━━ TCG STORE COUPONS ━━
Found a good coupon? Share it with the community. Tired of searching for discounts on Google before every purchase? Cardume gathers and ranks the best TCG store coupons in one place.

━━ WHO IS IT FOR ━━
Players of Magic, Pokémon, One Piece, Lorcana, and any TCG who frequently trade cards and need a reliable way to organize it all.

Download for free and invite your group.