In Wordpress admin, go to
Plugins > Add new > search keyword: “WooCommerce Multilingual – run WooCommerce with WPML” > click on [Install Now] button to install it.
Or you can go to
Plugins > Add new > [Upload Plugin] to upload extension package.
Note: Plugin works based on WooCommerce > 3.3.0
After installed, go to
Woocommerce > Woocommerce Multilingual > select tab [Multi-currency] > click on [Add currency] button to add new currency then config other fields as you want.
Now, you can change the currency on your app:
Me > App settings > Currency