OX Sync App is a mobile phone application developed by OX Software GmbH for Android users with a valid OX App Suite account. It is designed to help users sync their OX App Suite Appointments, Tasks and Contacts environment directly from their mobile phone. The app integrates seamlessly with the default Android calendar and contacts apps, thanks to its implementation as a sync adapter.

The app provides support for synchronizing appointments and tasks, including recurring appointments, tasks, and exceptions. It also supports synchronization of OX Calendar colors and all private, shared, and public OX Calendar folders. Additionally, it offers full support for time zones which can also be used in OX App Suite.

Moreover, OX Sync App also provides synchronization of name, title, position, website, instant messengers, and contact information. The app is available for free and can be white-labeled and rebranded if required.

Please note that OX Sync App only works with a valid OX App Suite account and is available exclusively for Android users.