SunMax: Vitamin D Tracker

SunMax turns sunlight into science-based guidance for vitamin D and safer sun exposure — in the app, on your Home Screen, and right on your Lock Screen.

Using real-time UV data, a personalized profile, and a multi-factor model built around your skin type, exposed skin, sun angle, session timing, and weather conditions, SunMax helps you plan outdoor time more intentionally.

KEY FEATURES

Free features:

• Personalized setup
Create your profile, take the Fitzpatrick skin quiz, and tailor guidance to your body and skin type.

• Vitamin D session tracking
Start live sessions and watch your estimated vitamin D and burn-risk guidance update as conditions change. Daily limit of 20 minutes.

• Live Activities & Dynamic Island
Follow your session from the Lock Screen and Dynamic Island: vitamin D produced, your current rate, and progress toward your goal update in real time — even when the app is closed. Pause, resume, or end with a tap.

• Sunburn warning
See how long you can safely stay in the sun, and get alerted when it's time to seek shade.

• Widgets, Siri & Control Center
Add widgets for current UV, today's best sun window, vitamin D progress, and light routines. Start a session by asking Siri, from the Shortcuts app, or with the SunMax button in Control Center.

• Real-time UV + weather intelligence
View current UV, hourly trends, and forecast context to choose better times for sun exposure.

• Apple Health sync
Connect Apple Health to autofill your height, weight, and body metrics, import last night's sleep for your morning check-in, and save your sun-session vitamin D and time in daylight back to Health. Optional and off until you turn it on.

• Daily goals, supplement logging, and reminders
Track sunlight and supplement intake together so you stay consistent with your routine.

• Account benefits (free)
Create a free account to save and sync your data across devices, and customize avatar clothing for more accurate exposure estimates.

• Limited past session logging
Add up to 1 past session per day to backfill your history.

Premium subscription features:

• Unlimited vitamin D sessions
Track as many sessions as you want with no daily time limits.

• Unlimited past session logging
Add as many past sessions as you need to complete your vitamin D history.

• Morning and evening light routines
Track circadian rhythm exposure separately from vitamin D sessions — and follow your progress from the Routines widget.

• Wellbeing insights and correlations
See how your sun exposure affects your sleep, mood, and energy throughout the day — enriched by sleep data from Apple Health.

• Advanced analytics and longer-range trends
View weekly and monthly progress with historical data and detailed insights.

• Streak freeze protection
Protect your daily streak with monthly freeze days.

Subscription details:
SunMax offers optional auto-renewing subscriptions for Premium features, including monthly, yearly, and lifetime options where available. A 7-day free trial may be offered to eligible new subscribers.

Built for walks, workouts, beach days, and everyday time outdoors, SunMax helps you use sunlight more intentionally.

Important: SunMax provides estimates and guidance, not medical advice. Sunburn timing is an estimate — always use your own judgment and protect your skin.

Terms of Service: https://www.sunmaxapp.com/terms-of-service/
Privacy Policy: https://www.sunmaxapp.com/privacy-policy/