There are two places where a user can select the currency that is to be used in the app. 

• Checkout Block > Settings
• Settings > Advanced Settings 

Setting your currency in the Checkout block is important for those users that want to sell products from their app. This can only be done using PayPal and its supported Express Checkout Currencies. The selected currency in a Checkout block will always override the Localization settings under Advanced Settings for the currency at the time of purchase. All products will always be processed using the price set in the Products block and the currency selected in the Checkout block. There is no conversion between currencies in AppMachine apps. 

Users who are not using a Checkout block but who would still like to display their products in the local currency can set their currency in the Advanced Settings of the app under the Localization section.