This app is designed and developed for buisness purpose. You can add contacts in your contact list from CSV or Excel file there is certain limit when you will add contacts in your contact list from CSV or Excel file because you can not add infinite no of contacts in your phone book there is certain limit. by default it will add at one time 500 contacts in your phone book, if you want to change you can increase it's limit to 5000 by chage in settings. After that you can filter out your whatsapp conatcts and you can sea that contacts in , and you can export whatsapp conatcts in CSV Excel or pdf file as per requirement.
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