I just though a cool and handy feature to have would be a "meditation mode".
Not sure if this can be done with an app or simply select a button on the phone.
Essentially, by pressing the "meditation Mode" button, The phone will instantly play some Japanese " Zen type or tranquil" music you can meditate to. The phone can track your breathing and heart rate.
As I usually meditate in a dark room, a cool feature would be to have a light on the back of the phone that will illuminate the room, varying in colors, that could mimic a sea wave.
Could be a great feature for calming autism and stimulating sensory.Something like below. I have not seen this done anywhere before and thought it would be a big selling point and a great feature to reduce stress.