The best alternatives to Contacts Timeline are Google Contacts, Cardbox, and Contacts Board. If these 3 options don't work for you, we've listed a few more alternatives below.
Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Cardbox reimagines the address book as a social network. It’s the one central place to stay connected to the people in your life, without all the noise. No posts, no likes, no ads; just contacts. Manage only your own card, and subscribe to each other’s contact information with just one tap.
Quickness uses the power of Siri in iOS13 to allow you to create new contacts quickly, without having to type anything! Quickness also supports running the 'Add Contact' shortcuts from the Apple Shortcuts app, so you can integrate with them other apps.