In my opinion, at the moment = now For example: I'm listening to music at the moment. in the moment = for a while For example: I'll be back in a moment. Hope that helps! :)

I'm very busy at the moment I will call you back in few minute. Wait here someone will be with you in the moment.

Well, it's pretty much the difference between "in" and "at". Does that help? :)

A moment is a period of time, depending on the meaning I'm very busy at the moment She's so focused , she's in the moment

Tanks