As it says on the tin. Could do with small improvements.

Simple and works.

2 small improvements I’d love to see:

1) add an option to use a currency aggregator, so you don’t have
to manually set and change the currencies if you choose to
(and can use it together with plugins like WooCommerce Currency Switcher
and have no discrepancies between the listed prices)

2) some styling options or just a CSS class option
so we can manually style it and have it look slightly different from
the main currency text.

Additionally, maybe an On/Off option (deactivate of course works, but
could be a bit easier within the plugin interface)

Other than that, nice plugin.
Thanks.