GMail not marked read on computer after reading on iphone

Hi BenEvest,

To clarify, is the sync broken both ways? For example, if you go to the web server and read one or more emails, then refresh the Mail app on your iPhone, are they then marked as read?

Additionally, if you haven't already, toggle Mail off and back on under Settings > Mail > Accounts > [your gmail account name]. This forces a resync with the Gmail server.

If the issue continues beyond that, remove the account from your iPhone entirely and add it back.

• Sync photos between your Mac and iPhone, iPad, or iPod touch - Apple Support

"Log out of or remove email accounts

1. Go to Settings  > Mail > Accounts.
2. Tap the email account you want to remove, then do one of the following:

• If you’re removing an iCloud email account: Tap iCloud, tap iCloud Mail, then turn off “Use on this iPhone.”
• If you’re removing another email account: Turn off Mail.
  • Note: To remove the email account from all apps on your iPhone, tap Delete Account.

Add email accounts

The first time you open the Mail app on your iPhone, you may be asked to set up an email account—just follow the onscreen instructions.

To add additional email accounts, do the following:

1. Go to Settings  > Mail > Accounts > Add Account.
2. Do one of the following:

• Tap an email service—for example, iCloud or Microsoft Exchange—then enter your email account information.
• Tap Other, tap Add Mail Account, then enter your email account information."

Cheers!