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Apple should definitely include stuff like this in their iPhone hardware. (an actual thermometer). They have the premium and margin to do so and it would make the iPhone even more sticky as a platform.

Thermometer and other biometrics would be great. In theory you could measure a pulse by touching the phone and it detects the vibrations, runs that through some ML. Maybe possible already?

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The pulse is probably doable but difficult, at least on an iPhone. The noise in the accelerometer data from just holding it is pretty substantial.

Pulse is pretty trivial with another sensor on pretty much every smart phone out there: the camera

I've been using pulse apps for probably at least a decade

I’ve compared iPhone pulse apps to my Polartec H10 chest strap and they are wildly different many times. More than 10% difference easily.

Isn't it on the iWatch?

Yes but not for the wearer to take measurements of their body temperature for example to see if they might have a fever. It only takes readings at night while the wearer is asleep, and only provides data in the form of trends against your individual baseline.

So it can be useful to see if you were generally hotter last night than normal, which could be useful when sick, but you can't open a thermometer app and check your actual temperature which would have more utility.

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