SolGlow: Vitamin D Tracker

Direct Sun: for the days you're not just outside — you're out in it. DIRECT SUN (PRO) Start a session in Direct Sun mode and the headline number becomes your burn budget: the share of today's burn threshold you've spent, live on your Lock Screen and Dynamic Island. It never recommends more time and never estimates a tan — it only counts down, and tells you plainly when it's time to get out. Sunscreen (with the reapply timer) stretches the budget; nothing else does. YOUR BURN ALERTS GOT MORE HONEST (FREE, FOR EVERYONE) A sharp-eyed user in New Zealand — with a weather station on an all-day-sun deck — showed us a wrong cloud forecast could talk the app into "no burn risk" on a burning day. Fixed, at the physics level: burn math now refuses to believe clouds remove more than half of the clear-sky UV at your sun angle. Forecasts can be wrong; your burn alerts no longer inherit their optimism. ALSO NEW • Sky looks clear? Tell SolGlow, and for the next 30 or 60 minutes it uses true clear-sky UV instead of a cloudy forecast — labeled, with a countdown • Add your own vitamin-D foods (green-lipped mussels, anyone?) — and serving sizes now speak metric where you do • Raising your daily goal no longer erases history: past days keep the goal they were lived under, so met days stay met • Sun sessions now have an in-app status page, and past sessions can be reviewed and edited in History • "September Head-Start" is now Winter Head-Start — it always keyed off your latitude's seasons, and now its name works in both hemispheres • The serum projection now states its assumption: your current intake, held steady As always: no accounts, no analytics, no ads. Your data stays on your device (and your own iCloud only if you enable backup). Estimates are educational, not a diagnosis — always consult your clinician about vitamin D and blood testing.