Onlinemarkat Com review for Beast Currency Converter

I blame shopify for not adding these basic features like currency switcher with localization to store and keep us under developers mercy, App developer is not helpful, when i changed the theme i asked him to configure the app to my new published theme (and when i change theme i do it because there are very important updates in next version or i decided to change to new theme that serve my needs) developer configured theme but still there were gaps in configurations, i told him that currency still appear in shop default currency in both collection page and cart page, the app developer refused to continue support and he said that i keep changing my themes so he cant help me any more!!!! same time, their app is not working if i configure it by myself, so the conclusion, they want me to pay for monthly fees but with their conditions and their own mood to fix their app errors!! i have to watch the errors in theme and keep silent!!! this is super unprofessional