Android.

I have an iPhone for dev and have had several others from past jobs, I simply don't understand how anyone uses them regularly, glorified walled-off etch-a-sketches where you need permission just to turn the knobs.

While I appreciate the efforts of Graphene, the juice doesn't seem worth the squeeze with regard to non-factory friction since I still don't trust the underlying hardware. Maybe an OSS phone will someday change the math on that.

Until then everyone should operate on the assumption everything is keylogged and exfiltrated on any mobile device, because it's not only just possible, but because the incentive and resources also exist to do it.