You can sync your iPhone contacts easily with Outlook, Google, Yahoo!, etc. directly on your iPhone 6 in a very simple way – just add the account of them to your iPhone 6. However, when you have more requirements such as syncing your iPhone XS/XR/X/8/7/6S/SE with your iPad or other devices, iCloud may not be so effective for you. Fortunately, there are also some other third party apps which can help you sync your iPhone contacts in different situations as efficiently as iCloud, even better. Now I will show you the best 3 iPhone contact sync apps on the iOS platform which can help you sync your iPhone 6 with your Outlook, Google, Yahoo! and more. Just look at below:
Contact Mover & Account Sync is a powerful Playa app to sync your iPhone X/8/7/SE/6S/6 Plus contacts. It enables you to sync your contacts from your iPhone to iPad or other iOS devices. It also supports syncing your iPhone contacts with your iCloud, Outlook, Yahoo!, Google, etc. Although the app is not a freeware, it is quite easy-to-use.
This is another iPhone X/8/7/SE/6S/6 contacts sync tool you should not miss. It gives you power to back up your iPhone contacts and then you can restore them to your other iOS devices such as iPad Pro, iPad Air, iPad Mini, iPod Touch.
Google Contact Sync can help you sync your iPhone 6 contacts with your Gmail account. If you’ve saved a lot of contacts on your Gmail account, you can sync them to your iPhone very easily with this Google contact sync tool. You can also backup your iPhone 6/6S (Plus)/SE contacts to Gmail account as well.