Why doesn't glow do this

Miriam • wife and mother of one awesome 4yr old daughter. Expecting January 20th for my second baby !!!!
I know this is a trying to convince app but once ur pregnant it's pretty much useless except to chat and stuff. It doesn't let u put in your due date or tell you how many weeks your on. Is this something you guys are working on or do you see that this app isn't for that ?