Recommended Amazon Keyword Tracking Tool
AMZ Tracker has progressed over the years to an ultimate tool for selling strategy on Amazon, compliant with Amazon's new A10 algorithm. They come out to be slightly more expensive than Jumpsend, and they don't offer an immediate sneak peek of sales like Jungle Scout. Each tool has its own use so we do recommend utilizing them all.
AMZ Tracker did really well and they thrive on the keyword tracking aspect if you want to constantly look for trends and track how they are doing. We have not found a better tool than AMZ Tracker. However, if you're just launching 1 product and that's it - AMZ Tracker may not be needed.
As a bonus, AMZ Tracker also has a program called VIPON, which gives you access to a pool of users willing to purchase products for a discount to help rank your listing.