Sunmaxxing: Sun & UV Index

Vitamin D, Streaks & Ranks

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

The sun is out. Are you? Sunmaxxing finds your best daily sun window, pings you when it opens, and turns going outside into streaks and ranks. You were not built for indoor lighting. Sunmaxxing turns getting outside into a streak you'll actually keep — it finds your best sun window every day, pings you when it opens, and ranks you up as you show up. HOW IT WORKS • Your Daily Sun Window — we crunch local UV, clouds, temperature, and air quality to find the smartest time for you to step outside • The Signal — a push notification the moment your window opens • Session timer — 5 to 20 minutes, survives app restarts, live UV on screen • Streaks with Protected Days — rain all day? Unsafe UV? Your streak is protected. We never push you outside in bad conditions. • Seven ranks — from Basement Dweller to Certified Sunmaxxer. Streaks are the only way up. BUILT-IN SUN SAFETY Sunmaxxing is about consistency, not UV dosage. Protection reminders at UV 3+, personal UV limits tuned to your skin's sensitivity, and no streak pressure when conditions aren't safe. No medical claims, no tanning promotion — just you, outside, at the right time. Your location is used only while you use the app — never tracked in the background. Manual city entry works too. Sunmaxxing Pro is an auto-renewing subscription (weekly, monthly, or yearly; the weekly plan starts with a 3-day free trial). Payment is charged to your Apple Account; the subscription renews unless cancelled at least 24 hours before the period ends. Manage or cancel in Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thomassoftwarellc.com/sunmaxxing/privacy.html

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The developer, Daniel Thomas, 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
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Daniel Thomas
Size
83.3 MB
Category
Lifestyle
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.
Languages
English
Age Rating
9+
In-App Purchases
Yes
  • Pro Weekly $4.99
  • Pro Monthly $8.99
  • Pro Yearly $49.99
  • Learn More
Copyright
© 2026 Thomas Software LLC
  • Privacy Policy

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