Beware! It will keep using your contacts, even if you decide to remove it. I installed it and later uninstalled it because it was not what I expected and went to another app. I unauthorized it from using my Gmail contacts. It did not remove my contacts from their database and I keep receiving weekly emails from them about some duplicate contacts. I was directed to a site for a SAR request, where according to their instructions, asked them to delete all my data and I got a confirmation email for it. Even so, as if nothing happened, I still get email reports with duplicate contacts from my phone, which means they deleted nothing and are still in possession of my personal data despite GDPR rules. I have no reaction from them whatsoever.
Contacts+ at Google Play market analyse