Your day at a glance. A readiness score built from last night's sleep, sleep timing, resting heart rate, and heart rate variability, measured against your own usual range, never anyone else's. And it shows its work: tap Why this score and the arithmetic is on screen, your normal, what each signal added or subtracted today, and the total, line by line. One Thing Today surfaces the single reading most worth your attention. Five pillars, Vitals, Activity, Sleep, Mind, and Nutrition, organize every Apple Watch reading with a plain-language line under each.

A home screen you arrange. Drag the cards you care about to the top and switch off the ones you do not use. Heads-ups always stay pinned. Choose Light, Dark, or System, and every metric carries its own pillar color so you can tell at a glance which part of your health a number belongs to.

Sleep, in depth. A sleep score that shows its math. REM, deep sleep, efficiency, timing consistency, and interruptions, with every weight visible and every cutoff cited to published sleep research. Anchored to your own baseline once VitalCast learns it.

Training load. Your last 7 days of workouts against your 28-day norm, built from your Watch's effort scores. When load is building while your recovery runs low, VitalCast suggests an easy day, and Rest Mode pauses the nudges entirely while you get over something.

A heads-up when something shifts. Overnight wrist temperature, breathing, and heart signals are compared to your own usual range. When a few run off-baseline together, you get a calm heads-up, graded, never dramatic, never a diagnosis. Research from large wearable studies backs the pattern, and the citation is right there.

Medications, mood, and the gaps. Import your medication list from Apple Health on iOS 26, or log meds in seconds, with a cited review of side effects and interactions to discuss with your clinician. Log a mood and see how it moves with your sleep in your own data. Blood pressure, glucose, and vitals write back to Apple Health so your record stays whole.

A briefing you can check. Daily, weekly, and monthly briefings in plain language, with every line traceable to your data and its source study. Briefings available in English and Spanish. A one-page doctor export PDF summarizes meds, vitals, symptoms, and trends for appointments.

Private by design. Your health data never leaves your iPhone. No account, no analytics, nothing collected. App Store privacy label: Data Not Collected.

VitalCast is a wellness app. It compares your readings only to your own history, never labels anything normal or abnormal, and never diagnoses. Always talk to a clinician about medical concerns. The weekly briefing and logging are free, always. VitalCast Pro adds daily check-ins, all briefing tones, vitals and trend charts, full history, and the doctor export for $3.99 a month or $29.99 a year, with a 7-day free trial.