Syncios 7.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within System Tools, more precisely Device Assistants. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is a product of Anvsoft Inc.
From the developer:
Syncios Manager is a powerful iTunes alternative and iOS manager, trusted by millions Apple users. It can help you backup and restore your iOS device with a few clicks as well as transfer data between your Mac and iPad/iPhone/iPod without using iTunes. Besides, you are able to use your iOS device as an external USB Key for extra convenient storage and transfer data between two iPods, iPad to iPhone and etc.
You may want to check out more Mac applications, such as SynciOS Data Transfer, SynciOS Data Recovery for Mac or Syncios WhatsApp Transfer, which might be similar to Syncios.
Backup & Restore
iPhone & iPad