Burntimes

Burntime is an offline UV planning companion for iPhone and iPad. Enter the UV index from your weather source, choose your sunscreen SPF, skin type, exposed skin area, and protection choices, and Burntime turns them into a practical planning window, countdown, reapply schedule, and sun-dose log.

Built for outdoor days
- Manual UV entry: no location request, no weather API, no account.
- Fitzpatrick skin-type selection for personalized estimates.
- SPF, exposed-skin, shade, clothing, hat, cloud, altitude, and reflective-surface inputs.
- A live countdown with haptics and optional notifications.
- A two-hour sunscreen reapply schedule with estimated product amount to pack.

New in 2.1
- Evidence Deck: 12 bundled offline reference cards covering UV bands, sunscreen amount, reapplication, photosensitivity, reflection, altitude, cloud cover, SED dose tracking, vitamin D caveats, and privacy.
- Guide tab upgrade: jump from the WHO UV band guide into the Evidence Deck without an internet connection.
- Clearer wellness wording throughout: Burntime now describes its outputs as planning estimates, not medical decisions.
- Removed the outdated purchase-info row from the app and metadata.

Planning tools
- Today screen: UV, SPF, exposed skin, physical protection, estimated planning window, timer, sunscreen amount, best-time-of-day planner, reapply schedule, SPF planner, and vitamin D caveat card.
- Conditions screen: adjust effective UV for altitude, reflective surfaces, and cloud cover.
- Budget and Sun Dose tabs: track logged sessions by day and view a seven-day Standard Erythema Dose estimate.
- Guide tab: WHO-style UV band actions plus the new source-card deck.
- History tab: export your sessions as CSV for your own records.

Privacy by design
Burntime has no accounts, ads, analytics, tracking, subscriptions, developer backend, HealthKit access, or location access. Everything runs on device. Sessions and preferences stay in local app storage.

Important
Burntime is a wellness planning and education tool, not medical advice. Estimates are approximate and depend on real-world conditions, correct sunscreen use, individual biology, medication labels, and clinician guidance. Follow sunscreen labels and public-health guidance, and reapply sunscreen every two hours or after swimming or sweating.