Take a look at this sentence.
Many apps are not good. Even some of Apple's own apps are not different.
I intend to mean some of Apple's own apps are not good. Is this correct?
I think you're looking for "Many apps are not good. Even some of Apple's own apps are no different."
As an aside, hope you're writing something very smart to back up this sort of broadly scathing claim. Does "many" refer to thousands of apps you've checked? Which "some" of Apple's own apps? etc. Are you sure this is not just a biased opinion of your own? Because your audience will probably not tolerate highly personal opinions to which they cannot relate.