Is it
Cortana (Windows assistant similar to siri)
Call on me, I answer you.
You can say "Hey Cortana" and it answers you.
I am a ring but I'm not for you.
That's Cortana's logo.
I can talk, I think it's surprising too!
Sort of (not really) new tech some people may be suprised by their phone talking to them
You see me away from apples
Not found on apple
Stuck on windows
Only on windows
My games are right up my sleeve
Cortana has "Guess the Horror movie" game and such games if you ask her to start one.
But sometimes every now and then, your anger will want me to leave
Those voice assistants often drive me nuts
I have a sister
She is older than me
Probably sister siri who has been around longer
She doesn't have time to give opinions about me,
Siri says "No comment" when you ask her about Cortana.
But I think we're both trying to make the world better.
When you ask Cortana if she likes Siri, she says "Of course, we're both trying to make the world a better place.
My voice is soothing
I'm a perfect lullaby singer
But not only that
but I can sing nursery songs, too!
I have tons of them, right in here!
You can ask Cortana to sing
July is my boss's dreams:
July is Windows' (In this case, Bill Gates') special release month.
The hint:
As you know, Bill Gates made Windows, the OS that has Cortana, so "Open up the gates" is a key.
lord of the ring
!! :) $\endgroup$