Hello Sun - Vitamin D Tracker

Get enough sun without burning. Real-time vitamin D estimates, burn time that adapts with you, sun + supplement tracking, and a weekly rhythm that fits real life.

Hello Sun helps you track vitamin D from sunlight and supplements — with burn-aware timers that keep your skin safe. Built around a weekly rhythm (not daily perfection), Hello Sun makes it easy to stay consistent in real life.

KEY FEATURES • Safe sun sessions: reliable timer, burn countdown, and clear warnings • Vitamin D estimates: live IU estimates during sessions + daily totals • Sun + supplements in one place: log supplements and see combined progress • Adaptive acclimation: learns from your history to fine-tune burn time for you • Weekly progress: rolling 7-day status, insights, and trends • Smart planning: UV forecasts + best windows based on your skin and location • Edit anything: adjust sessions and supplements for any day • Winter Mode: supports low-UV seasons and locations • Privacy-first: no ads and no selling data

HELLO SUN PLUS Unlock extended planning, unlimited history, deeper insights, year views, and themes.

Important: Hello Sun provides estimates, not medical advice. Always protect your skin and consult a healthcare professional for personalized guidance.

For our Terms of Use (EULA), visit: https://termsofservice.hellosuntracker.com

For our Privacy Policy, visit : https://privacy.hellosuntracker.com/