1. I use appannie to get rid of useless keywords. If a keyword rank more than 100, I delete it since most keywords traffic comes from searching top 5 ranks. My question is is this correct? Since some time user use two words to search. Maybe "word1" rank 100, but the search of "word2 word1" have a good rank. So is the action to get rid of rank more than 100 word good?
2. For option keywords. I need to know the popularity(how much people use it to search) and the difficulty(how many competitor apps under this keyword). appannie only have search result number. sensortower have traffic and difficulty, but those are not reliable and accurate, right? Now appstore search on iphone do not list the result app number now. What is the best way to get specific kw's traffic and difficulty?