Sund: UV, Vitamin D & Tanning

Sund turns sun exposure into something you understand.

Most UV apps show you a number. Sund shows you what it means for your skin. How much vitamin D you're making, when you'll burn, and how your tan is really progressing.

Know your UV, personally. Real-time UV index and 10-day forecast for your local area. Sund reads that UV through your own skin tone, so the advice fits you instead of a generic scale.

Vitamin D from the sun, tracked. See how much vitamin D your skin makes each day from real sunlight. Follow it across the whole year and understand your body's natural rhythm. No weather app can tell you this.

Sunscreen that makes sense. Get the right SPF for today's UV and your skin type, with a clear reason why. No guessing.

Alerts that protect you. Sund watches the UV for you and warns you before it gets dangerous. Get a heads-up when the index climbs past your limit and when your burn risk rises. Set it once and let Sund do the watching.

A tanning program that respects your skin. Tell Sund your target tone and it builds a 14-day plan made for you. Each day gives you a Beach Day session length based on that day's real UV and your skin type, always kept under your burn threshold so you tan without burning. Reach your goal safely, then keep it with maintenance mode.

Built to respect you. 100% on-device. No account, no analytics, no cloud. Your skin data never leaves your phone. Camera scans are processed locally and never saved.

Weekly and annual plans available. No trial gimmicks, just the full app when you're ready.

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Sund Premium unlocks Beach Day mode, your personal 14-day tanning program, Personal Stats, and advanced burn-risk alerts.

Subscription options:

Weekly — $3.99 per week Annual — $24.99 per year

Payment is charged to your Apple Account at purchase confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings.

Privacy Policy: https://cagataykoca06.github.io/SundPrivacyPolicy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/