Believe me or not; you've complete liberty to form your opinion.
In my view, none of the the keyword tool can show 'Accurate Data'. This word 'Accurate data' means complete and impeccable.
All keyword tools show estimated data. Everybody keyword tool is made up of algorithm and algorithms are statistical. Therefore, If you're thinking of getting accurate data, I would suggest you to bar off this idea.
Well, I found ubersuggest really interesting and helpful because It shows results in real-time demographically.
Believing that you've got a correct answer of your question.