The Willow 3.0 in-bra breast pump is designed to help nursing parents carry on with their lives while pumping, and its latest new feature adds an extra level of convenience: a companion app for the Apple Watch. The app lets you change modes, control suction, and track your sessions without having to fiddle with the pump itself or pick up your phone. That doesn’t sound particularly earth-shattering, but in case you weren’t aware, I’ll let you in on a little secret: breast pumping is…