The first one is not an idiom - it's a literal use of the words. That's the one that you COULD use "its" instead "the."
The others use the idiom, and you don't change the words of an idiom. Just use it as-is.
The last one doesn't work quite right. What issue did you address correctly with your product? It could work, if you had a sentence before about trying to target a specific demographic, but as a stand-alone sentence, that one doesn't work so well.
Student or Learner