SunshinePal

A vitamin D and daylight tracker. See how much vitamin D the sun likely gave you today — estimated from the live UV index, your skin type and your time outdoors — plus your supplements, your safe-exposure window and a daily light goal. Automatic with an Apple Watch; works on iPhone alone too.

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See SunshinePal in Action

Experience how effortless it is to track your sunlight exposure and improve your well-being.

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Why Sunshine Matters

You track steps, heart rate, sleep and calories — but not how much natural light you actually got. For most people who work indoors, it's the one thing nobody measures.

SunshinePal measures it for you. With an Apple Watch (Series 6 or later), it reads your time in daylight from the Watch's ambient light sensor through HealthKit — no start button, nothing to remember. No Apple Watch? The UV index, burn-time window, sun times, supplements, goals and widgets all work on iPhone alone, and you can log a session by hand.

From there it estimates how much vitamin D you made, using the live UV index, your skin type (Fitzpatrick scale) and your time outdoors. It doesn't replace a blood test — it answers the question a blood test can't: was today enough? Estimates are labelled as estimates.

It's not about baking in the sun. A personal safe-exposure window tells you how long you can stay out before burning starts, so "enough sun" doesn't quietly turn into too much.

🔒 Privacy First

Everything stays on your device. No cloud upload, no account, no analytics, and nothing sold to advertisers. SunshinePal reads from and writes to Apple Health on your device only with your permission.

Read Privacy Policy

Features

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Vitamin D Estimate

Estimates your body's vitamin D production from the live UV index, your skin type and your time outdoors — so through grey weeks and winter you can see when a supplement is doing the sun's job.

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Automatic with Apple Watch

With an Apple Watch (Series 6 or later), your time in daylight is detected on its own and synced through HealthKit. Without one, log a session by hand.

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Supplements Count Too

Log vitamin D, K2, magnesium and omega-3 with one tap. They're added to what the sun gave you for one daily total, synced both ways with the Health app.

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Before You Burn

A personal safe-exposure window from the current UV index and your skin type: how long you can stay out before burning starts.

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Daily Goal & Score

Set a daily light goal — 15 minutes or three hours — and get a 0-100 score for how close you came. Streaks and Game Center achievements keep it going.

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Trends & History

Seven-day and monthly views, weekly rings for consistency, and your real peak outdoor hours.

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Widgets & Reminders

Home Screen and Lock Screen widgets show today at a glance, and a reminder nudges you outside if you're falling short — at a time you choose.

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Private & Secure

Everything stays on your device. No cloud upload, no account, no analytics.

How It Works

Set Your Skin Type & Goal

Choose your skin type and a daily light goal. SunshinePal uses them with the live UV index.

Get Outside

With an Apple Watch (Series 6 or later), time in daylight is detected automatically. Without one, log your session by hand.

Check Your Day

See your vitamin D estimate, supplements, score and progress towards your goal.

Frequently Asked Questions

☀️ About SunshinePal

Q: What is SunshinePal?

A: SunshinePal is a vitamin D and daylight tracker for iPhone and Apple Watch. It estimates how much vitamin D you made from the live UV index, your skin type and your time outdoors, adds the supplements you log, shows a personal safe-exposure window, and tracks a daily light goal.

Q: Do I need an Apple Watch?

A: No. With an Apple Watch (Series 6 or later), time in daylight is tracked automatically. Without one, the UV index, burn-time window, sun times, supplements, goals and widgets all work on iPhone alone, and you can log a session by hand.

Q: Is SunshinePal free?

A: Yes, it's free to use. An optional Premium unlocks advanced insights and additional widget styles — weekly, yearly, or a one-time lifetime purchase.

🎯 Features

Q: How does it estimate vitamin D?

A: From the live UV index, your skin type (Fitzpatrick scale) and your time outdoors. It's an estimate and labelled as one — it doesn't replace a blood test.

Q: How does it track sunlight?

A: With an Apple Watch (Series 6 or later), it uses the Watch's ambient light sensor to detect your time in daylight, synced through HealthKit. You can also log sessions by hand.

Q: Can I log supplements?

A: Yes. Log vitamin D, K2, magnesium and omega-3 with one tap. They're added to what the sun gave you for one daily total, synced both ways with the Health app.

Q: Can I set daily goals?

A: Yes. Set a daily light goal — 15 minutes or three hours — and get a 0-100 score for how close you came, with streaks and Game Center achievements.

🔒 Privacy & Data

Q: Is my health data private?

A: Yes. SunshinePal works with Apple Health on your device. There's no account, no analytics, and nothing is shared with or sold to third parties.

Q: Where is data stored?

A: Everything stays on your device. There is no cloud upload and we don't run servers for your data.

Legal & Privacy

Privacy Policy

We believe your health data belongs to you. Read how we protect your privacy.

Read Privacy Policy →

Terms of Use

Understand the terms and conditions for using SunshinePal.

Read Terms of Use →