This is very cost effective apps, user friendly, without complication.
The customer service is also amazing and helpful when you have any issues.
I would definitely recommend
Onlyfresh | Amanova
App with a beautiful design (very comfortable with the Shopify UI) and mainly with all necessary tools in order to translate the most important details.
This review is on the first version, I am sure that in the future this app will be even better and has what it takes to be one of best translation app for Shopify.