iSync is described as 'Software application published by Apple Inc. It runs only under Mac OS X and is used to synchronize contact and calendar data from Address Book and iCal with many non-Apple SyncML-enabled mobile phones via a Bluetooth or USB connection' and is an app in the backup & sync category. There are three alternatives to iSync for a variety of platforms, including Mac, Windows, Android, iPhone and Android Tablet apps. The best iSync alternative is AkrutoSync. It's not free, so if you're looking for a free alternative, you could try SyncMate.
AkrutoSync automatically and privately syncs Outlook PC contacts, calendar, tasks and notes direct with any Android, Windows phone, iPhone or iPad. Keeps information out of cloud.
SyncMate syncs data on Mac with Android and iOS devices, Windows services (Outlook, Office 365 Business and Office 365 Home accounts), other Macs, Google, Dropbox and iCloud accounts, any mounted storage devices, MTP devices.
Mobile Master is a mobile phone administration program and synchronization Pro for Sony Ericsson, Nokia, Motorola, Samsung, LG, Benq Siemens and iPod. Synchronize your phone data with your PC. Edit your phone book easily at your PC.
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