We’re now bringing similar checks to the Gmail app on your iOS device. Going forward, when you click on a suspicious link in a Gmail message on your iPhone or iPad, we’ll show the warning below. We recommend that you use caution before proceeding, because the link is likely unsafe. Only proceed if you’re confident there’s no risk.
If you click on a link known to be dangerous, you'll be shown a page that warns you against visiting the original URL.
You can download Gmail from the App Store for free.