One thing to be careful of when using 3rd party exchange rate services: make sure they are using the right rate source for your needs.
For example, if you need the exchange rate on order to convert a quarter's sales from some non-EUR currency to EUR for quarterly VAT MOSS reporting, you are supposed to use the rate reported by the European Central Bank on the last reporting day of the VAT MOSS quarter.
The submitted service is using ECB, so should be fine for that specific use case.
For example, if you need the exchange rate on order to convert a quarter's sales from some non-EUR currency to EUR for quarterly VAT MOSS reporting, you are supposed to use the rate reported by the European Central Bank on the last reporting day of the VAT MOSS quarter.
The submitted service is using ECB, so should be fine for that specific use case.