Yep! I have the Evolv, and I use the third-party MedM BP apps[1][2] to sync the readings from the device via bluetooth to my phone (and HealthKit). No first-party app needed.
Is it possible to connect to these devices from BT-enabled device like raspi with a dongle? I'd like to avoid sharing any health-related data with VC-funded businesses (Apple, Google, not only app developers)