Gmail Calendar is an excellent assistant in crazy busy workdays. It helps us keep track of various appointments, meetings, events and lessen our burden in the mess. And since Gmail Calendar can be synced on iPhone, it is extremely convenient for users to check on their schedules by just taking out their iPhone /5c/6/6s/6 Plus/6s Plus/SE/7/8/X/11. Unluckily, some users are unable to enjoy the convenience because somehow their Gmail calendars don't sync on iPhone. For these users, we have some tweaks to fix the problem.
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Turn on Calendar When Setting up Gmail Account
First thing first, you should make sure that you have turned on the Calendar option when setting up Gmail account. If you are not sure, you can check for the setting in the following steps:
Go to Settings>Mail>Account, tap on the Gmail account that you have added.
Scroll down and you will see the Calendar option, toggle on the option if it is off.
Set up Fetch Feature
Apple does not allow Gmail (or any IMAP-based email) app pushes a notification about a new email. So if you want to get new email notification without opening the Gmail app manually, you can use the Fetch feature on iPhone. When turning on Fetch, the app will check for new email at a frequency of 15 minutes to hourly. Actually, this feature works for updating Gmail calendar events, too.
Go to Settings> Mail> Account> Fetch New Data, tap on the Gmail account that you have added up.
Tap on Fetch, you can then choose the frequency (every 15 minutes, every 30 minutes, hourly or manually.)
Tip: For better battery life, you should probably set Fetch in less frequency.
Set Your Gmail Calendar as Default Calendar
Again, go to Settings>Calendar>Sync> All Events.
Go Back to Calendar, tap on Default Calendar and then pick a Gmail calendar as default.
Delete and Add Gmail Account Back Again
If you still can't see your Gmail calendars on iPhone after you have tried the above methods, then you can re-add your Gmail account to solve the problem.
When you delete a Gmail account, you'll remove all Gmail data from your iPhone, including mail settings, login details, drafts, mail messages, mailbox content, etc. And when you add the account back on the iPhone, all email messages will come back to the iPhone so long as those emails have not be deleted from the mail server.
Go to Settings>Mail>Account, tap on the account you want to delete and click Delete Account on the bottom.
After that, go back to Settings> Mail> Account, click Add Account and choose Gmail. Then enter your Gmail account and password. After the account has been verified, you can save the account on your iPhone.
Have you solved the problem? Please let us know how the methods work for you by leaving a comment below. If you need help to transfer iPhone calendar to other device or computer, here is how to export iPhone calendar.