I gave this app a shot with a tier 1 purchase and got blown away, then I fully stacked it right before it ended. I'm really impressed with how it tracks the keywords you input and shows how much search volume it has. AFAIK, you can also add your competitors and it won't cost additional credits, so that means you get to spy on them for free. How cool is that?

You may need to look at their help docs to get the full potential of this tool, and just keep playing with it to have a feel of how it will be handy to your projects.

Currently, it works on Google SERP only. You can add your Amazon, Walmart and eBay storefront, YouTube channel and videos, social media accounts, etc., and you will see how they rank in Google. Awesomesauce!