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Life & fun · April 13, 2026

Sun Day

Your UV coach - know exactly when to soak it up or hide

Visit apps.apple.com ↗Alternatives

What it does

Sun Day turns your phone into a personal sun coach. Get real-time UV for your exact spot, track your vitamin D minute by minute, and get a gentle nudge the moment your skin needs a break. 100% free, no ads, no tracking. iOS & Android.

Does the same job

all alternatives →
  • SunSeek2024 · ▲228

    Sunlight exposure & vitamin D tracker

  • My Skin Track UV2018 · ▲83

    A wearable that tracks exposure to UV and pollution

  • Suntime2022 · ▲75

    Don't miss another sunset

  • IB
    I built a daily sunlight tracker2025 · lumehealth.io · ▲46

    I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!

  • SolarisApr 2026 · apps.apple.com · ▲3

    Know the best time to go outside — personalized for you.

  • DayDay 1.02017 · ▲109

    Track your progress on a daily basis by taking photos.

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