If you have an iPhone, you don't have to switch to Apple programs just to access your calendar on your computer. You can sync with both Outlook and Google Calendar.
How to Sync Your iPhone with Outlook Calendar
If you use Outlook as the calendar on your computer but rely on an iPhone while you're on the go, you'll want to sync the calendars.
You can sync your iPhone with Outlook whenever you connect it to your computer via the dock or Lightning cable with the following steps.
1. Connect your iPhone to your computer with the cable.
2. Launch iTunes if it doesn't automatically open.
3. Select your iPhone from the device list, click the Info tab and open the menu under “Calendars.”
4. Select to sync from Outlook. If you have multiple calendars, you can choose which to sync by clicking “Selected Calendars” or choose “All Calendars” to sync all.
5. Click “Apply.”
If you don't want to connect your iPhone to your computer to sync every time, you can also perform this action via iCloud using these steps:
1. Download and launch iCloud on your computer. It's available for free from Apple here: www.apple.com/icloud/.
2. Sign in to your iCloud/Apple account.
3. Click the gear icon in the upper, right corner to access iCloud settings.
4. Select to sync contacts, if applicable, and “Calendat & Tasks.” Choose Outlook at the source if multiple calendar programs are installed on your computer.
5. Click “Apply” and exit iCloud.
You can then add events or contacts to outlook to sync wirelessly with your iPhone.
How to Sync an iPhone with Google Calendar
The easiest way to sync information from the calendar on your iPhone or from iCloud is to download the Google Calendar app to your phone. This app is available for free and maintained by Google.
1. Install the Google Calendar app to your iPhone from the App Store.
2. Launch the app and sign in with your Google account.
3. Make sure your calendars are set to sync in Settings. Turn on the toggle for “Mail, Contacts, Calendars.”
Syncing will begin automatically when you open the calendar app, and you will be able to access events added to either directly to Google Calendar on your iPhone or any other calendar on your iPhone, including iCloud, when browsing Google Calendar on your PC, tablet or in a browser.