OneContact has been discontinued. Similar apps include Google Contacts, which is free. Other options are ConnectYou, Contacts and Microsoft People. In total there are four Contact Managers like OneContact for the web, Android, iPhone, iPad and Mac.
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.
United States
Contacts, called Address Book before OS X Mountain Lion, is a computerized address book included with Apple Inc.'s macOS.
United States
People in Windows 10 puts all the ways you connect with all your friends, family, colleagues, and acquaintances in one place, so it’s faster than ever to keep in touch.
United States
