Vitamind vs Circadian Blueprint

The sun is nature's best source of energy. But how much sun do you need to get enough Vitamin D, and when is it actually strong enough? Vitamind takes the guesswork out of it. We help you find the perfect time window to get your daily dose of sun – safely, naturally, and personalized for you. How it works: The sun needs to be at a certain angle above the horizon for your skin to produce Vitamin D. By combining your location, real-time weather data (including UV index and cloud cover), and your skin type, the app calculates exactly when you should head outside. Key Features: Smart alerts: Get a push notification the moment the sun is strong enough (when the "Vitamin D window" opens). Personalized: Calculates the time you need based on your specific skin type (I-VI). Practical estimates: See how many minutes you need outdoors, whether you're wearing "T-shirt and shorts" or just exposing your face and hands. Visual dashboard: Track the sun's path and plan your day with our simple, easy-to-read Vitamin D graph. Disclaimer: This app provides general estimates based on algorithms and weather data, and is not intended as medical advice. Everyone's skin reacts differently. Use at your own risk and always avoid sunburn.

Your body runs on a 24-hour clock, and light is what sets it. Circadian helps you work *with* that clock instead of against it — wake near sunrise, soak up bright light during the day, and protect your evenings — so you sleep better, feel more energized, and build a rhythm that actually lasts. It runs quietly in the background and adjusts to the sun at your exact location, every single day of the year. No guesswork, no manual updates. WAKE WITH THE SUN Set an alarm relative to sunrise — 20 minutes before, right at sunrise, your choice — and it automatically shifts earlier and later as the seasons change. You wake with natural morning light instead of an arbitrary number on a clock. PROTECT YOUR EVENINGS A gentle reminder fires before sunset (15 minutes by default, adjustable) to put on your blue-light blocking glasses. Cutting evening blue light helps your body wind down naturally and protects your sleep. TRACK YOUR LIGHT Start a Light Session when you step outside and Circadian measures your light exposure, scoring it by brightness, duration, and time of day. Going for a walk? Take a quick reading and pocket your phone — hands-free mode keeps tracking your time. Hit your daily light goal and watch it add up. BUILD THE HABIT A simple daily check-in — "Did you catch the sunrise?" — keeps your streak alive. See your weekly and monthly consistency at a glance, and let small daily wins compound into a real routine. WORKS OFFLINE Sunrise and sunset times are calculated on your device using your location — no internet required after setup. Your data stays on your phone. COMPLETELY FREE Every feature is unlocked for everyone. No subscription, no in-app purchases, no ads, and no third-party tracking. Your circadian rhythm is the foundation of your sleep, energy, and mood. Start building it today — one sunrise at a time.