iPhone Screenshots


Synchronize your Gmail contacts with your iPhone in one click. Choose any sync direction. Your contacts are always up-to-date with 1Sync.

The app will handle all the basic tasks that arise while working with address books: moving contacts between email and phone book, creating mirror lists, backup copy to another account, automatic synchronization.

The most important settings are on the main screen. Change accounts and synchronization directions easily. One touch and you have access to account details and the contact list. Control of the application is really easy and intuitive.

- Versatilily
Support of popular protocols CardDAV and Exchange including Gmail, iCloud, Outlook.com and Yahoo! email services.

- Various synchronization directions
Use the application to create identical contact lists in two accounts or to move data from one to the other.

- Safety
Your contacts are protected from accidental damage. Additionally, you can always revert the latest synchronization.

- Speed
An advanced synchronization algorithm will handle very long contact lists.

- Automatic synchronization
1Sync lets you daily update you account information automatically in the background.

- Photos from Facebook
Your Facebook friends' contact information and newest profile photos are now in your address book.

What's New

Version 1.3.1

What's New in Version 1.3.1
- Minor bug fixes.

Customer Reviews

1.7 out of 5

11 Ratings

11 Ratings

Syncs one way but not the other. No support?


Bought this to sync iCloud contacts to gmail, and gmail to iCloud.

Syncs Gmail to iCloud fine but not iCloud to Gmail. Emailed support for the app twice in 6 days and no response yet.

Paid for the pro version. Thought this might be a good app for people in the company to use (real estate) but can't get any answers about the issue.

Great except it does not work.


Appears so easy to set up but its not working when I try to sync Gmail Contacts to iCloud it does not work. The app says it added the contacts to iCloud but there are not really added when I check in iCloud.
Also there is no way to contact the app creator on their site.

does not work. don't buy! scam!

T. A. Fields

it doesn't work at all. just freezes and crashes and closes app. has not synced anything once. Total rip off. I want my money back.


Kraftwerk 9 Inc
9.7 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, German, Italian, Portuguese, Russian, Spanish
Age Rating
Rated 4+
Kraftwerk 9 Inc © 2016
In-App Purchases
  1. Pro version $3.99
  2. All contacts synchronization $2.99
  3. Auto synchronization $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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