Articles
Practical guides to tracking your health, your home, and your money: what the numbers mean, where they come from, and how to keep them together.
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Body
What your weight, body fat, and measurements such as your waist say about your health, and how to measure them well.
11 articles
Vitals
What your blood pressure, heart rate, oxygen, and other vital signs mean, and how to measure them at home.
22 articles
Sleep
How much sleep you need, what your tracker’s stages and scores can tell you, and what helps you sleep better.
12 articles
Hearing
How loud is too loud, and how to read a hearing test to look after your hearing.
3 articles
Wellbeing
How to track your mood, energy, and stress on scales that give the numbers meaning.
3 articles
Symptoms
How to keep a symptom diary your doctor can use, and rate pain and other symptoms on standard scales.
3 articles
Menstrual Cycle
What’s normal for your cycle, what your temperature shows, and why a calendar can’t predict your period.
5 articles
Labs
What your blood test results mean, such as cholesterol, blood sugar, and thyroid tests, and how to follow them over the years.
22 articles
Nutrition
How much of each nutrient you need, such as protein, fiber, and sodium, and how to track what you eat.
17 articles
Activity
How much exercise and how many steps are enough, and how to train, recover, and track your workouts.
13 articles
Fitness
How to test what your body can do, such as your VO2 max, grip strength, and push-ups, and what the results mean.
7 articles
Location
How accurately your phone knows where you are, and what your location history can tell you.
1 article
Air Quality
What CO₂, particles, and other pollutants at home mean for your health, and how to measure and improve your air.
7 articles
Finances
How much to save, how big an emergency fund should be, and how to see where your money goes.
5 articles
Habits
How to set targets you can keep and build habits that last, such as exercising more or smoking less.
9 articles
Devices
How accurate your scale, watch, and other devices are, and what to do when they disagree.
20 articles
Apple Health
What your iPhone and Apple Watch measure, how accurate they are, and how to bring their data together with the rest.
11 articles
Imports
How to bring the data from your apps, devices, and bank together in one place.
2 articles