Hope you're doing well and safe!
I have found some interesting apps that you can use, since your focus mainly is on the currency converter I would recommend you to use an app such as - https://apps.shopify.com/currency-converter-ultimate/reviews?rating=3&sort_by=recent
(This app is easy to install and use, in the free version it lets your use 2 to 3 currency converters and the customer support is good as well)
Further, if you're looking for a complete package app for geolocation, currency converters, EU cookie bar, etc., my recommendation tilts towards - https://apps.shopify.com/cozy-country-redirect?surface_detail=geolocation+&surface_inter_position=1&...
(It does not have a free version but the 31 day free trail tells you all you need to know to understand that the app is worth the money)
Hope my thoughts and suggestions will be of help to you!