Installing more than one currency converter app on your store will create chaos and conflicts between apps and none of them will be able to function properly.
Many apps, when uninstalled- leave their codes or scripts behind. Hence, even creating a higher conflict among various other apps; ultimately site collapse. Therefore, it’s always advisable to clean the apps before installing them.
XOOT never allows this to happen on your site. That’s why each app is pre-cleaned and tested before launching.