Aera: Health & Readiness

Your body doesn't run on averages. So Aera doesn't score you against one. It reads your sleep, recovery, stress and training against a baseline learned from your own nights and your own sessions. Then it explains itself, every time.

THE DIFFERENCE Most health apps hand you a number. Aera hands you the reason. Wake up to a low recovery and it won't just colour it red. It looks at what actually landed yesterday, a hard session, a short night, or both, and tells you what a day like that usually costs you, measured against your own comparable days. If yesterday was an ordinary walk, it says so instead of blaming it. And when it doesn't know, it says that too. No invented causes. No confident nonsense. Tap any number and an article explains how it was calculated, which research it rests on, and where the estimate stops being trustworthy.

TODAY Recovery, Stress and Strain read side by side, with last night in a sentence and what moved with it. The background follows the hour, Morning Bloom at dawn through Deep Settle at night.

SLEEP A score built from five signals, not one vanity number: how long you slept, your stages, how unbroken the night was, your sleeping heart rate and your overnight heart rate variability. Aera is honest that watch-estimated stages are noisy, and weights them accordingly. Your bedtime window is learned from your own onset and wake times, never a rule from a book. Sleep need, reserve and debt track what your body is actually owed.

TRAINING Readiness up front, and a session built from the week you actually had. Tap any workout for a 3D flyover that replays your run in space, splits coloured by heart rate zone, grade adjusted pace on hills, and whether you finished stronger or eased off. Aera finds the routes and stretches you keep coming back to and keeps your history on each one, including whether you are moving faster at the same heart rate. Load is named the way athletes name it. Detraining, Maintaining, Productive, Peaking, Overtraining. No softened euphemisms.

STRESS AND STRAIN Stress is read from your resting and sleeping heart rate, your overnight heart rate variability and your temperature, always against your own baseline. It is kept deliberately separate from Recovery so the two never simply echo each other. Strain scores what the day cost your body against your own capacity. Not a calorie count.

BIOLOGICAL AGE Your body's age read from seven signals, including cardio fitness, resting heart rate, heart rate variability, movement and sleep. Each one shows what it adds or takes away, and Aera is candid about where the estimate ends.

YOUR BASELINE, NOT POPULATION NORMS Most apps score you against a lab average or a 25 year old athlete. Aera learns your rhythm over weeks and compares you to the only body that matters. Yours. The baseline moves as you do.

PRIVATE BY DESIGN No account. No cloud. Apple Health goes in, and your health data never leaves your iPhone. Aera collects anonymous usage and crash reports so the app can be fixed and improved. Nothing about your body is uploaded, sold or shared.

EXPORT ANYWHERE 7 days, 30 days, 90 days, a year, all time, or a range you pick. JSON for your own analysis, a spreadsheet for Excel or Sheets, a polished PDF for your doctor. Your data leaves when you decide it leaves.

WHO IT'S FOR People who want to understand their body, not compete with strangers. Runners, sleepers, parents, students, anyone who has been told their numbers are normal when their body clearly isn't.

Aera is free to use. A subscription unlocks the Sleep Bank, Flyover replay and the Monthly Review. If you trust your own rhythm more than the average, Aera was built for you.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/