Contact management

I am looking for a contact manager to replace a google account or iCloud account.

I am currently on iOS (and actively dislike it after being on android since forever) and looking to increase my privacy by cutting ties with my google accounts.

A Google account presently manages my contacts, and I do not want iOS to take over this job, I’d rather manage them myself.

I tried searching for FOSS contact managers but all I found was client relation software which isn’t what I want at all…. I don’t think.. I just want my phone numbers and names saved for easy personal use.

Is there anything good for managing a personal phone book?