Tanning App: UV Index - Sunlit

Know exactly how long to stay in the sun. Live UV index, your skin type and a smart timer that stops you before you burn.

Sunlit turns guesswork into a plan. It reads the live UV index at your exact location, learns your skin type, and tells you how long you can safely stay in the sun - so you build a natural, golden tan instead of a sunburn.

WHY SUNLIT A good tan is a question of timing, not luck. Sunlit combines real-time UV data with your Fitzpatrick skin type, the SPF you applied, your tanning goal and how much skin is exposed, then calculates a personal session length and an estimated burn time. You always know when to start, when to turn, and when to stop.

HOW IT WORKS

1. Tell Sunlit your skin type - or scan it with the AI photo scan
2. Check today's UV index and pick your best tanning window
3. Set your SPF, your goal and your exposure, then start the timer
4. Follow the reminders and stop long before the burn time

LIVE UV INDEX AND SUN FORECAST

• Current UV index, temperature, sunrise and sunset for your location
• 10-day UV forecast so you can plan the week or your holiday
• Hourly view that highlights today's best tanning window
• Instantly see when UV is too strong and when conditions are ideal

KNOW YOUR SKIN TYPE

• Find your Fitzpatrick skin type with a short onboarding quiz
• Or run the AI skin scan: take a photo and let Sunlit estimate your type
• Every recommendation is tailored to your skin, never a generic average
• Adjust for sunscreen SPF and for how much of your body is exposed

SMART TANNING TIMER

• Start a guided session and track your sun exposure minute by minute
• Position-change reminders so you tan evenly on every side
• Sunscreen reapplication reminders at the right intervals
• Estimated burn time stays visible, so you stop before your skin does

VITAMIN D TRACKER

• See the vitamin D you produce during each session in the sun
• Log supplements alongside your natural sunlight intake
• Follow daily and weekly progress at a glance

SESSION HISTORY AND PROGRESS

• Every tanning session is saved automatically
• Review total time in the sun, streaks and weekly trends
• Understand how your tan is building, and when to take a rest day

WHO SUNLIT IS FOR

• Beach, pool, garden, rooftop and balcony sunbathers
• Anyone with fair skin who burns easily and wants a safer routine
• People chasing a golden glow before a holiday, a wedding or a shoot
• Runners, cyclists, golfers and outdoor workers tracking UV exposure
• Parents keeping an eye on the sun index for the whole family
• Anyone interested in vitamin D from natural sunlight

SUNLIT PREMIUM Sunlit is free to download. The free version includes a 2-day UV forecast and one AI skin scan per day. Premium unlocks the full 10-day UV forecast, unlimited AI skin scans and your complete tanning history. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period and can be managed in your App Store account settings.

MEDICAL DISCLAIMER Sunlit is a sun-exposure planning and tracking tool. It is not a medical device and does not diagnose, treat or prevent any condition. It does not detect skin cancer, moles or other skin conditions, and all timings, burn estimates and vitamin D figures are estimates only. Always use sunscreen, protect your eyes, avoid peak UV hours and consult a qualified healthcare professional or dermatologist for medical advice, especially if you have sensitive skin, a history of skin cancer or take photosensitising medication.

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