Roe v Wade: Are period-tracking apps still safe to use in the US?

The recent leak of a draft opinion from the US Supreme Court suggests that Roe v Wade could be overturned, eliminating the country-wide right to an abortion. The prospect has re-raised questions about the privacy of period-tracking apps. Some apps share data with third parties for advertising or research purposes, causing concern this data could be used as evidence against anyone seeking or obtaining an abortion in states that outlaw the procedure should Roe v Wade be overturned. Period-tracking apps vary in scope. In some, people record simple details, like when their period begins and ends, and the app the makes predictions about when their period will arrive in future and when they are ovulating.