What the phone is for
iPhone MT5 trade alerts are the fills and the warnings, not a second place to gamble. A push tells you a position opened or that behavior looks like a revenge trade. You can still open the app and see the book.
Telegram does the same job in chat form, including a close command. That page is Telegram MT5 alerts. Push on Basic is $9.99 a month.
The phone does not replace the guard
If you are away from the desk, a warning is late unless something can close the trade without you. That something is Equity Guard on Pro. The phone tells you it happened.
Create the account on the web, connect MT5, then sign in on the iPhone with the same user. The login is shared. The trades are not retyped.