I want to use hidemy.name VPN from iPhone. How secure is it to install their configuration profile and certificate?

Question

iOS

The question is, will the installation of the configuration profile give the ability to control the iPhone (up to blocking)?
Can the certificate be used to intercept confidential information, passwords, etc.?
It's not about the reputation of the service. And people are different and vulnerabilities)
Thanks in advance to those who responded!)

Answer 1

The application is signed by the developer and approved by Apple, the certificate has also repeatedly (with each new release) been verified by AppStore moderation.
The application exists only for your convenience, and you can connect to VPN using iOS tools without installing anything at all: https://hidemy.name/en/faq/#a7-9

Answer 2

Everything can be because of this, people do not use such services, but they themselves make vpn servers abroad