An argument could be made to say the most important app that Apple ever created is their Health App. Apple's Health app is an absolute treasure trove of good, useful, insightful data. Combining it with an Apple Watch (and other sensors, such as my [[Oura Ring]]) make its capability crazy good. Its only limitation from a quantified-self enthusiast's perspective is its lack of (good) mechanisms to "correct" data. While you absolutely _can_ manually add data, it's less easy to manually _correct_ inaccurate data... and it's on you to find these inaccuracies. [[Automatically Tracked, Manually Confirmed]] is my gold standard, and the app only really excels at one of the two. It natively supports tracking: - [[Sleep Duration]] and some portions of your [[Sleep Hygiene]] - Duration & type of Exercise - Running/biking/swimming speed, cadence, distance, etc - Steps, [[Move Your Body|sedentary]] time, and the standard pedometer stuff - Including [[METs]], which I didn't know about - Body measurements (Weight, height, etc) - [[Macronutrient Calories|Macros & Calories]] & micronutrients - [[Vitamin D]] - Medications - Mental wellbeing - [[Go Outside|Time Outside]] - Respiratory info - Respiratory Rate - O2 level - [[VO2 Max]] & Cardiovascular fitness **** # More ## Source - Self ## Related - [[VO2 Max]]