separate contacts App Android

Hey guys...
This post may go a bit long....so plz be patient.

I am looking for an app that can store phone contacts separate from the ones that are stored by the default contacts app. So that the default contacts app does not have any access to those contacts. I think this is possible if the other app stores them in a diff format...but I'm not able to find any app that can store contacts other than .vcf

To make it simple...this is why i want that.
I dont want some of my contacts to...

separate contacts App Android

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