Matches v1.5.0 in Google Play:
New version features:
> All functionality is now FREE! Review mistakes, set up your personal lesson plan, use the AI Tutor with the available sections, all for FREE!
> DSI Pro Membership focuses entirely on advanced content (Units 2-14)
> New "Progress" area for tracking how you are doing in each topic area of data science
> Visual refresh of all pages to better match new areas
> Content Updates