Editorial was updated to version 1.3.4 with iPhone X support just now ...

I have a PyBoard, but haven't done much with it beyond trying the tutorials on (http://micropython.org). Although the PyBoard is very interesting, i would prefer the WiPy (http://wipy.io) which also runs microPython on bare metal but is capabele of connecting through WiFi. In combination with Pythonista this would mean that your iPhone / iPad could interface with low-level sensors.