To use the CoinZoom Visa card go into the CoinZoom App -> Visa CoinZoom Card and choose which wallet to use for the purchase.
The Spend Wallet screen lets you select the currency you want to use for a transaction by tapping the Pie icon to show the different wallets you may choose to spend from. Each wallet shows the estimated current value in USD. After selecting your currency, present your card to the cashier and CoinZoom will automatically sell the selected currency and complete the transaction.
In the mobile app, the CoinZoom Card screen is accessed from the Trade button at the bottom. The dropdown shows an estimate of how much of each currency is available to spend, converted to USD. After selecting your currency, present your card to the cashier and CoinZoom will automatically sell the selected currency and complete the transaction.
When you swipe your card CoinZoom will confirm that there are enough available funds in your account to pay for the amount requested. If there are enough available funds, the transaction will be approved. As the transaction is approved CoinZoom will create a market order for the number of coins in the designated wallet to cover the purchase.
If there are not enough funds in the designated wallet, the purchase will be denied and you'll need to choose a wallet with more funds available.
For some purchases, like at a restaurant where a tip is often added to the bill after the transaction is approved, the tip amount may not show on your account until the next day.