Vitamin D Tracker · iPhone

A safer tan. More vitamin D.

Know when to be in the sun. Vitamin D Tracker plans the best window from live UV, your skin, and the time you actually spend outside — then tracks the session and your progress.

★★★★★ 5.0 — Loved by Sun chasers
Vitamin D Tracker: a safer tan and more vitamin D. Best times to tan, track exposure, stay within safe limits, and support vitamin D.

A tanning plan for your skin.

Vitamin D Tracker reads live UV, temperature, and cloud cover, then marks the window that fits your skin. You get a notice when it's time to go out.

  • Ideal time to tan, with the UV and cloud cover behind it
  • Minutes toward your vitamin D target, and a limit before burn risk
  • A day chart of UV, temperature, cloud, and the hours that suit you
Vitamin D Tracker home in Berlin: UV 3, a vitamin D target, and an ideal tan window at 11:14

UV index and vitamin D, while you're out.

Start a session and Vitamin D Tracker keeps the clock, the UV you're under, an estimated vitamin D total, and how long until sunburn risk.

  • Real-time UV, estimated IU, and time until sunburn
  • Pause or stop when you head inside
  • Your skin profile and SPF shape the limit
Vitamin D Tracker session in Barcelona: UV 6.7, 1,600 IU estimated, and time until sunburn

Vitamin D from sunlight, tracked over time.

Each session keeps the UV, the minutes, and an estimated IU total. The week adds up in one place, and your photos stay on the phone.

  • Session details: average UV, time outside, estimated vitamin D
  • Weekly sessions, minutes, and a daily average
  • Tan photos stored only on your device
Vitamin D Tracker progress: 20 minutes outside, 383 IU estimated, and a weekly vitamin D total
Loved on the App Store

What early members are saying.

★★★★★

Helped tanning with my sensitive skin

I have sensitive skin and this app helped with getting colour without burning. I use the app to find out when to go out.

Maya
★★★★★

Great tracking experience

Love being able to understand my vitamin D intake. Super helpful for tracking UV windows through the week.

James
★★★★★

Love the planner feature

I used to guess how long I could stay out. Vitamin D Tracker gives me a window and a limit I actually trust.

Priya
Pricing

Simple, transparent pricing.

Start free. Upgrade when you want the full plan, history, and Watch.

Free
$0 / forever
Today's sun plan and core tracking.
  • Home UV and next window
  • Session tracking
  • Basic widgets
Download Free
Monthly
$4.99 / month
Full Vitamin D Tracker Pro, billed monthly.
  • Adaptive weekly plan
  • Full history & travel planning
  • Sun Coach, Watch & advanced widgets
Get Monthly
Lifetime
$14.99 once
One-time purchase. No subscription.
  • All Vitamin D Tracker Pro features
  • Pay once, keep access
Get Lifetime

Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage subscriptions in App Store settings. Free trial forfeited if you purchase a subscription where applicable.

FAQ

Common questions.

Yes. Vitamin D Tracker is free to download and includes today's sun plan and core session tracking. Vitamin D Tracker Pro adds adaptive weeks, full history, travel planning, the Sun Coach, Apple Watch features, and advanced widgets. Upgrading is optional.
No. Vitamin D Tracker estimates vitamin D from forecast UV, your skin profile, and how long you were outside. It is not a medical device and does not replace a lab test. You can optionally log blood test results on your device for your own reference.
UV and weather vary by place. Vitamin D Tracker uses your chosen location — device GPS or a city you search — to fetch Apple Weather forecasts and build your plan. You can change location anytime in Settings.
Sessions, tan photos, preferences, and blood test entries stay on your iPhone. Vitamin D Tracker sends your location to Apple Weather for forecasts; it does not upload your photos or lab results to our servers. See our Privacy Policy.
Not at this time. Vitamin D Tracker is built for iPhone and Apple Watch with Apple's weather, HealthKit, and widget APIs.
Absolutely. Cancel anytime from your iPhone's Subscriptions settings. You keep Vitamin D Tracker Pro access until the end of your current billing period.
Vitamin D Tracker app icon

Built by Solvra Studio.

We're a small team that got tired of guessing how long to stay in the sun. Vitamin D Tracker turns forecast UV and the profile you actually live with into a plan you can follow — without pretending to be a medical device.

Questions or feedback? daniel@solvrastudio.com