Get motivated with quick seven-minute workouts
What to download: CARROT Fit ($2.99)
CARROT comes loaded with a bunch of compact workout programs and a surly, borderline sadistic AI whose mission is "to transform your flabby carcass into a Grade A specimen of the human race. She will do whatever it takes -- including threatening, inspiring, ridiculing, and bribing you -- to make this happen." As you use it, it'll keep the Health app up to speed on your progress, so you can keep tabs on how your day-to-day and week-to-week workouts are interacting with your diet, sleep, and more.
Give your doctor the most complete view of your health
What to download: MyChart (free)
MyChart has already revolutionized the way patients communicate with their doctors, providing a digital platform for patients to monitor their medical stats on a daily basis (e.g., blood pressure, weight, etc.) and track fitness data. Synced up with Health, it can use the info provided by your other health apps to give your doc an even fuller picture of how your bag of bones is holding up.