Naver popup dict on IOS? Use Marvin 3!

[Rianus]

I saw on this post https://forum.language-learners.org/viewtopic.php?f=15&t=10015&start=10#p132355 that it is possible to add third party dictionaries to IOS or within an IOS e-reader app. Could anyone point me to how to do this or what app is being used here to make this possible? I have been unable to contact the author of the post.

Thanks in advanced.

EDIT [SOLVED]: Use Marvin 3 app! It has a setting for dictionaries which you can change to URL, which will replace the apple system dictionary for the 'look up' feature in the app. That way you can use Naver or any online dictionary as a pop-up while reading instead of having to switch apps or use Papago translate through the share command.