FoxData offers free access to this feature: Keyword Optimization

This is a unique feature we provide for you to test out all the possibilities in terms of keywords research regarding your app metadata, making it more likely to rank higher or rank at all.

Basically, what we aim with this module is to enable a playground for your app metadata once you have tracked and explored the keywords you want to work with, tested out the keywords and spied on your competitors’ keywords.

In the left module, you can draft your title, subtitle, and keyword field for iOS, or your title, short description, and long description for Android.

Click on "Ranked" to select a competitor, whose ranked keywords will then be displayed in the draft section.

In the right module, a table displays your keyword list, allowing you to compare your current keywords with your draft.

For you have any other questions, please check out the link: Product Feedback