If you’ve enabled two-step verification for Gmail, enter the verification code you received via text or using Authenticator.

Select other Gmail data you want to sync with your iPhone by sliding the data you want to see on your iPhone to the “On” (green) position.

The main difference between the two apps is that you can set up non-Gmail accounts in the Inbox app.

When the button label changes to INSTALL, tap it again. An app icon has been added to your home screen.

If you are using the Inbox app instead of the Gmail app, it will ask you to sign in first before it asks you to allow notifications. You can change these settings by opening your Settings, scrolling down and tapping Notifications, then tapping Gmail or Inbox.

If your account isn’t listed, tap + Add account at the bottom of the list. Then enter your Gmail address, tap NEXT, enter your password, and then tap NEXT. If you’ve enabled two-step verification for Gmail, enter the verification code you received via text or using Authenticator.

To add or edit your Gmail accounts, tap ≡ in the upper-left corner of the Inbox, tap the downward arrow to the right of your Gmail address, then tap ⚙️ Manage accounts.