With Contacts Sync, you can quickly & easily sync your Gmail & iPhone contacts, giving you access to your contacts from anywhere. This app distinguishes itself with its reliability, ease of use, speed, and with a true “2-way sync” that merges changes made to both your Gmail & iPhone contacts. This is the #1 app for syncing Google and iPhone contacts both in terms of downloads & reviews.

Also of significance, this app syncs contact groups with Google. For instance, you may have organized your Gmail contacts into groups such as “friends,” “family,” and “coworkers.” After syncing, your iPhone groups will match your Gmail groups.

With many customization options, this app can be used in a number of ways. Of course, the app can be used to make your iPhone and Google contacts match each other, which also has the side effect of creating a backup. You can perform syncs in any direction including 1-way syncs and 2-way syncs. Also, you can sync any one of your contact accounts with Google, including your corporate Exchange contacts, iCloud, Yahoo, Outlook.com, or any CardDAV account.

CONTACT ACCOUNTS:
• Choose which iPhone contact account you want to sync with Google whether it’s an ordinary iPhone address book, iCloud, Exchange, Outlook, Yahoo, Facebook, or any CardDAV account

SYNC TYPES:
• Choose from one of the following sync types: 2-way sync, Gmail contacts -> iPhone, iPhone contacts -> Gmail, & Manual Sync
• Choose a 2-way sync to combine changes you’ve made to Gmail & iPhone
• Choose a 1-way sync to transfer changes in one direction only
• Choose a manual sync to sync selected contacts only

SYNCS ALL FIELDS:
• Syncs all fields including names, phonetic names, nicknames, email addresses, phone numbers, postal addresses, company names, job titles, departments, birthdays, anniversaries, events, notes, web page addresses, relationships, instant messaging accounts, & social profiles
• Syncs contact photos
• Syncs custom labels & custom fields

INITIAL SYNC:
• During the initial sync, the contents of matching Gmail & iPhone contacts will be merged

CONFIRM CHANGES BEFORE SYNCING:
• Review each change before the sync actually begins
• Easily override the suggested changes

AUTOMATIC SYNC:
• Automatically syncs contacts in the background 24/7

APPLY FILTERS INCLUDING GROUP FILTER:
• Sync specific contacts only by using filters
• Apply the group filter to sync contacts that belong to the specified groups only
• Apply the new contact filter to ignore contacts without an email address or phone number
• Various other filters available

AUTO ADD TO GROUP:
• Optionally add contacts to a specified group such as “Modified by Contacts Sync”

DUPLICATES:
• Combines Google & iPhone contacts without creating duplicates
• Eliminate duplicates at Google.com and sync to remove from iPhone