There are two ways the app could alert you of maintenance checks.
First, the timeline page has the manufacturer specific maintenance schedule. Based on that, the app will alert you when you reach your service interval. It will tell you what work should be done, the average price, and where to purchase those new parts.
Second, if there is a code pulled during a scan, that may require car maintenance. The app will take you to the conditions page so you can see the specific issue.