As a fresh marketeer I started to explore the topic of App Store Optimisation as it is the equivalent of SEO for mobile apps. I got the free plan to play around with it, using a very basic app from my company just to learn more on the topic. I think this is a perfect option for students or people who are just curios about ASO.
it helped to streamline the workflow and optimize the ASO of few apps that I am working on for clients. And again, it's free!