
Google may or may not be the safest platform out there, but it certainly has some features that worth their pride.
One of which, is Google's Advanced Protection Program. Launched on October 2017. it's "Google's strongest security for those who need it the most."
What it does, is trading off conveniences with security, forcing users to use the most secure login methods Google has, which is typically using a two-factor login using a hardware Security Key.
While its job is securing users' accounts, the system also severely limits how third-parties connect to a user's account. This is because Advanced Protection Program places automatic limits on which apps can gain access to users' Google data.
So, only Google applications were able to access users' data if they enrolled in the program.
Google was locking users out from those third-parties since authorized apps can often lead to account takeovers.

Six months after Google's Advanced Protection Program release, the company found a way to make those third-parties work. And that starts with iOS apps.
According to Dario Salice, Google's Advanced Protection Product Manager:
What this means, Apple’s native apps can access users' Gmail, Calendar, and Contacts data. Advanced Protection is supporting native iOS apps as part of a broader effort to bring more non-Google applications into the system.
But since third-party apps like iOS apps aren't Google's, users are required to navigate a more complex login process. But once the process is done, the apps should work like usual.
Salice said that Google is looking forward to expand the list of trusted applications that work with Advanced Protection.