Period Tracking App Refuses to Disclose Data to American Authorities
newsweek.com
newsweek.com
It's hard to trust a promise to not comply with the law. It's a nice sentiment but you can't really know how anyone is going to respond to the full brunt and pressure of the legal system.
Hyperventilating TDS aside, much more comforting for any service would be "we CAN'T hand your data over even if we wanted"