I have several free tutorials here on this website covering the free keyword tool Ubersuggest.
Indeed, there are different free keyword research tools in the market. Yet, all accompany limitations. It is possible that you will get to know about keyword ideas and suggestions. Nothing More!! I suggest you go for Moz. This keyword tool with extra elements of keyword search planned by Moz. Apart from difficulty, volume, Keyword Explorer offers:- Opportunity: Relative CTR of the natural outcomes on SERP.