1Sync - your contacts sync manager

Amazing Features

The best solution for contacts synchronization

An all-in-one assistant

1Sync is a free contacts synchronizer for iOS, designed to keep you address books up to date.

Work and personal mail

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

Accessible interface

No hidden or complex settings. Quick selection of accounts and synchronization directions. One-button update launch.

Automatic synchronization

1Sync allows synchronization of data between accounts as soon as you’ve made changes in one of those.

Multiple directions

Use the application to create identical contact lists in two accounts, or to transfer data between those.


Contact information and newest photos from your Facebook friends’ profiles, now in the address book.

No compromise

We develop applications leveraging the best software solutions to ensure maximum safety, performance and usability. 1Sync is no exception. Your contacts are protected from accidental damage. The advanced synchronization algorithm will handle most difficult tasks.

  • - Reliable and safe Contacts Framework
  • - Management of duplicates and merging of contacts
  • - Detailed synchronization results report
  • - Restoring of contacts

A genuinely useful application

To understand how important our contact are for us, losing those once will be enough. Many have found themselves in this situation: a phone lost, an email password forgotten… You may backup you contact book, but will you really do it systematically? Keeping several address books up-to-date manually is not easy, especially if you have hundreds or thousands of contacts.

1Sync will perform all the basic tasks that may arise while working with contacts: moving contacts between your email and phone books, creating mirrored lists, backup copying to another account, automatic synchronization.


A simple and inspirational interface will make working with 1Sync unbelievably comfortable.

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