Student or Learner
Manage your mobility spends at the click of a button.
Manage your mobility spends with the click of a button.
WHICH IS CORRECT?
The second one is correct
Either preposition is OK. But "spends" is not a noun that means the same as "those things which you have purchased" or "the act of purchasing something."
I think they are trying to use the word "spends" to refer to purchases or purchasing. I am saying that the word should not be used in that way.
Do you try to control your "spends" at the grocery store, or your "spends" in the monthly budget?
(I believe he is talking about things you purchase on your mobile phone.)
[not a teacher]
Personally, I would use "with" here, because "the click of a button" does not have quite the idiomatic ring to it that say "at the drop of a hat" does, which is what I think "at" would suggest. That is to say, I think "at" makes "click of the mouse" sound like it has inherent meaning over the literal action, which I don't think is the intent.