Contact Backup app helps you to backup your all contacts manually and you can also schedule your contact backup automatically every month, week or daily.
Contact Backup will automate backup process by taking backup of your all contacts on schedule time interval without disturbing you.
You can schedule contact backup automatically by Monthly, weekly or daily.
Take contact backup and save .vcf file to local storage, you can later share it via email.
Backup contact can be easily restored at any time by opening the .vcf file from local storage.
Requires Android
7.0 and up
https://play.google.com/store/apps/details?id=com.thinkgreat.contactbackup
https://play.google.com/store/apps/details?id=com.thinkgreat.contactbackup&hl=en_US&gl=US