Chronosync: Circadian Health

About

Chronosync Plus helps you understand your day through the light around you. Track sunrise, solar noon, sunset, UV context, estimated vitamin D exposure, sleep timing, and evening routines from one private, local-first iPhone app built around circadian awareness. Features: • Solar-aware daily dashboard • Sunrise, solar noon, and sunset alarms • Estimated vitamin D tracking based on UV, skin type, clothing coverage, and sky conditions • UVA and UVB context with plain-language explanations • Sun session timer with IU/min estimates, session summaries, and Live Activities • Sleep log and chronotype-based timing tools • Blue-blocking glasses reminders • Solar flare and space weather context • Native iOS Shortcuts actions • Local-first privacy with no Chronosync account required Subscriptions: Chronosync Pro Monthly and Chronosync Pro Annual unlock Pro features including timeline, score, night routines, sleep log, vitamin-D estimates, solar activity context, solar alarms, and advanced sun-session tools. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://chronosyncplus.com/privacy Important: Chronosync Plus is an educational wellness tool. It is not medical advice, not a medical device, and not a substitute for professional care. Vitamin D, UV, burn-time, and circadian outputs are estimates and may be inaccurate or incomplete.