What is Reddit's opinion of Drupe?
From 3.5 billion Reddit comments

➔ Drupe website

By popularity on Reddit, this Service is:

#11 in Contact Manager apps

1 review of this app found across Reddit:

BTW, if anyone is searching for dialer alternatives, http://www.getdrupe.com/ is my fav at the moment.

(Why am I using an alternative? https://forums.oneplus.net/threads/phone-dialer-and-call-history-not-working-disk-i-o-error.315276/ )