This article explains how to sync Google, Outlook, and iPhone calendars with the third-party app, Sync2. These instructions apply to Outlook 2019, Outlook 2016, Outlook 2013, Outlook 2010, and Outlook for Microsoft 365.

If you want to enter an appointment in Outlook and have it automatically appear in your Gmail and iPhone calendars, install the Sync2 app. Sync2 automatically keeps your Google Calendar, Outlook Calendar, and iPhone Calendar in sync on a Windows PC with Outlook. Here's how:

Download Sync2 and run the installation file.

Select the free trial version or the paid version in the installation wizard and select Next.