So I use a few different trackers. SerpFox, Serpbook, Rankwatch and so on. I'm wondering why they are all so different with their results? Shouldn't they all be running with no Google history? I know a lot of people use SerpBook here and think it's good. But if I use Google US in Incognito window I search my keyword and see it's at 72 in Google, yet Serbook shows that it's not ranking at all. Could someone help me understand why?