Which tools do you use for keyword difficulty & SERP tracker?

I think Ahref and serf tools are the best option other than that you can use GKP,MOZ .But not as effective as Ahref.

How I do it.

Kwfinder used for difficlty only.

Majestic spam score on domains and stats are more accurate then moz.

Hreff scrapping back links of competition

Serpbook for website keyword position

Domcop expired domains

All of the above I use from one to another as of there accuracy, I no it a lot of software but I go buy the big SEO talks and those that no how in the big world of SEO ,I am talking very big earners that even internet marketers buy courses from in the thousands ...

My method never let me down even for powerful pbn work

The reason I do this because stats and figures can be manipulated so each tool got it own real power and accuracy.

The trick is knowing who in front with there apps and accuracy and only use them apps

Any real big seo earner if they wish to can comment on my findings as it worked for me.
With the tools above and SEO yoast plugin can run a very successful SEO business easily .

Serpbook for keyword tracking and KWfinder for checking keyword difficulty.

KD - Ahrefs, Long Tail Pro
SERP Track - SERPLab and Rank Tracker