[vidyesh]

There is a lot of other data these apps collect other than just the calories you eat or burn. Of course almost everything is a approximation but better than zero data on anything.

Nobody gets overweight overnight. You might not end up being 'overweight' if you know your certain eating habit will end up being bad for you ( everybody has a different metabolism rate ) so you cannot say eating xxxxx causes your friend to gain weight so will it you gain weight if you eat it out of moderation. All the data being collected individually and studied/analysed over time for 'you' is what could change.

Everything you say is right and approximations have been working good for everyone till now, but there is never harm to move from approximations and assumptions to absolute certainty about a few things we can measure ( now ).

This data could help you know when is the right time to test your blood maybe?

[hunvreus]

Honest question; can you point me at these apps? The only stuff I've seen so far is either tracking external data (running, walking, activity, ...) or requires input (for calories for example). There are some dabbling with more interesting data (blood levels for example), but too inaccurate to be taken seriously for now.

I don't agree that approximation are better than zero data; people are already self-diagnosing a lot, without the understanding that numbers, averages and science in that field are not as accurate as we'd like it to be. It takes a physician to accurately guess what may be good/wrong with you (and I mean guess).

Ultimately, I feel there's enough big, obvious metrics you can derive from your body without strapping a fitbit on.

[vidyesh]

Sir, It seems you misread my first reply itself.

>...But still gathering all this data religiously is good ( I haven't yet ) as sooner or later....

Also, Physicians do not accurately take the data. They ultimately diagnose/analyse the data they get from tests/devices/you.

You should read my earlier replies keep in mind that nobody here said that the data could be used to STOP going to doctors, it would rather help us skip a few visits but ultimately of course if something tells you, you are going to be sick ( gadget or sixth sense ) you'll need to go to your medical practitioner. Doctors and hospitals can never be replaced.

Keeping yourself healthy is different from falling sick.