Sun exposure tracker

Track your sun exposure, daylight and vitamin D

Suntic records each sun session (the UV you were exposed to, your time in daylight and an estimate of the vitamin D you produced) and keeps the picture in Apple Health.

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Suntic showing vitamin D and UV exposure tracking with Apple Health

Most people have no idea how much sun they actually get. A sun exposure tracker turns it into something you can see and manage, useful whether you're trying to top up vitamin D or simply avoid overdoing it.

What Suntic tracks

UV exposure per session, based on the live UV index while you're out.
Time in daylight, so you can see your daily and weekly totals.
Estimated vitamin D produced, factoring in UV, skin type and time.
Apple Health sync, so your sun data lives with the rest of your health metrics.

Why it helps

Seeing your exposure history makes it easier to strike a balance: enough daylight for the benefits, without the overexposure that causes harm. Suntic keeps everything on your device, and Health data is governed by Apple's privacy protections. Estimates are guidance, not a medical measurement.

Pair it with the live UV index and read about what UV means for your skin.

FAQ

What is a sun exposure tracker?

It's a tool that records how much sun you get (your UV exposure and time in daylight) so you can manage it. Suntic also estimates vitamin D and saves it to Apple Health.

Can Suntic track vitamin D?

Yes. Suntic estimates the vitamin D you produce from each session using the UV index, your skin type and time outdoors, and can write it to Apple Health. It's an estimate, not a blood-level measurement.

Does it sync with Apple Health?

With your permission, Suntic writes UV exposure, time in daylight and estimated vitamin D to Apple Health, and reads your date of birth and biological sex to improve estimates. This stays on your device.

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Get Suntic free

Suntic turns the live UV index into personal safe-sun times, sunscreen reminders and vitamin D tracking on your iPhone.