Make an in-app purchase in Microsoft Store Content provided by Microsoft When buying apps or games in Microsoft Store, the plus icon means you can make in-app purchases with that item. You'll use the same checkout process for in-app purchases as you use to buy apps and games in Microsoft Store. Open Microsoft Store Last Updated: Oct 26, 2017 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.