Currency Switcher is available as a widget and works in any widgetized area, for flexibility the shortcode option is also available [woocs]. Graphically WooCommerce Currency Switcher can be presented in 3 different ways: drop-down, flags, side switcher. You can insert shortcode [woocs] in any place of your site, even in menu
Any currency from the world. 7 free currency rates aggregators to get actual currency rates automatically. Optionally you can be noticed about currency rates changes by email.
Welcome currency allows to set not basic price currency for your site visitors. So if your shop currency is BRL and you want let your customers see prices converted USD you just need to set this in WOOCS options.
GEO IP rules for visitors currency detection
This feature is more targeted and allows to set prices for your site visitors in their native currency.
Show approximate amount
Show approximate amount on the checkout and the cart page with currency of user defined by IP in the GeoIp rules tab. Works only with currencies rates data and NOT with fixed prices rules and geo rules.