Sundial - Tan Smarter
Sundial
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Now on iPhone: live UV, burn timers tuned to your exact skin, couples mode, and an AI coach that knows your skin. Free to start — tan smarter, never burn.
Sundial is the honest tanning app. Real sun science, personalized to your skin, with zero fearmongering and zero hidden fees.
Every number in Sundial is personalized to your Fitzpatrick skin type — your safe session length, when to flip sides, the SPF to wear, and your time-to-burn limit. Get a live UV index for your exact location with an hourly forecast, and let Sundial find your best tan window of the day.
LIVE UV, HOUR BY HOUR
• Real UV for your exact spot, with an hourly forecast
• Your best tan window — when UV is strong enough to glow but gentle enough not to burn
• Honest numbers, even when that number is zero
TIMERS BUILT FOR YOUR SKIN
• Personalized session length and a flip reminder for an even tan
• A hard stop before your burn limit
• Live Activity on your lock screen and Dynamic Island
• Vitamin D tracking for every session
WATCH YOUR GLOW BUILD
• Tone progress along the bronze ramp — no fake progress bars
• A selfie timeline of your tan journey
• Sun streaks, achievements, and total sun hours
TAN TOGETHER
• Pair with your partner in couples mode
• See when they're tanning and join their session
• Send a "catch the sun" nudge
• Build a shared streak and plan sun dates
AN AI COACH THAT KNOWS YOUR SKIN
• Advice based on your skin type, your sessions, and today's UV
• Ask anything from SPF picks to why your shoulders burn first
FIND YOUR SUN NEARBY
• Beaches, parks, and pools around you, with live UV and directions
HONEST PRICING
The core app is genuinely free — live UV, personalized timers, sessions, streaks, friends, and tan spots. No ads, no trial timer.
Sundial Plus ($9.99/year) adds the AI coach, full selfie timeline with tone grading, couples mode, and deep analytics. Or pay once with Lifetime ($19.99) — yours forever, no subscription.
Tan smarter. Never burn. Glow together.
Sundial's timers and estimates are guidance, not medical advice. Know your skin, and check with a doctor about sun exposure if you're unsure.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
The developer, NATHAN SYDNEY JONES, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- NATHAN SYDNEY JONES
- Size
- 66.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Sundial Lifetime $19.99
- Sundial Plus $9.99
- Copyright
- © 2026 Nathan Jones