Save your ass
There's one somewhat overlooked feature of the Health app that's worth knowing, since it could very well save your life: the Medical ID.
In the app, tap the tab in the bottom-right corner and fill out some basic vitals info (blood type, allergies, doctor/emergency contact info, etc.) Basically, this serves as a digital version of a medical bracelet -- readily accessible by paramedics and other well-meaning persons, even if your iPhone is locked (it pops up when you tap the Emergency button on the lock screen). You never know, it could come in handy in any number of precarious situations.
And help researchers find cures for chronic diseases
One of the best parts of the latest iOS 9 rollout (in addition to the neato Night Shift) was the deployment of ResearchKit and CareKit platforms as part of the Health app. Essentially, it opens the door for medical researchers to create apps for people with particular conditions and diseases, so they can create more studies and easily collect data on a day-to-day basis.
Editor's Note: In order for any of the above apps to fully sync with the Health app, you'll need to manually enable them to communicate with it in the app's settings, as well as in the Health app. For specific instructions, Apple has this handy guide.
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Joe Oliveto is a contributor for Thrillist, and is a hypochondriac, all of a sudden. Follow him on Twitter.
Joe McGauley is a senior write for Thrillist and will most likely never be primed for pregnancy.