Note: Make sure you have updated Chrome to version 85.0.4183.109 from the App Store
On your iPhone, launch the Settings app. Scroll down and tap on ‘Chrome’ from the list of apps that shows up in the lower section of Settings.
You will see a new ‘Default Browser App‘ option. This will probably read ‘Safari’ right now. Just tap on it. Here, select ‘Chrome’.
That’s pretty much it. Google Chrome is now the default browser on your iPhone. From now onwards, whenever you tap on a link to open it in a browser, your iPhone will launch Chrome instead of Safari. Obviously, you can also go back to Safari if you don’t like using Chrome on your smartphone by just following the steps above and selecting ‘Safari’ from the list. I’m still waiting for Gmail to get the option to be set as the default email client as well. As of this writing, the latest version of the Gmail iOS app doesn’t have the feature. However, now that it’s arrived on Chrome, hopefully Google will push out the feature to Gmail soon as well.