I have a question that's related to something like this, I haven't been able to find a definitive answer through Google. So let's say I want to create an app c

I have a question that's related to something like this, I haven't been able to find a definitive answer through Google. So let's say I want to create an app called "X this, not that!" But "Eat this, not that!" already exists and is an established brand. Their product is in the health/diet space, while mine is in alternative medicine. Could this be considered copyright infringement? My gut says it could be, but I think that if the product is very different then it should be fine.