Now built for iPhone Duo: Helios UV fills both displays edge to edge, folded or open. Live UV, burn time for your skin type, and alerts when UV crosses your threshold.
Helios UV is a beautiful, no-nonsense UV-index tracker for every Apple device
you own. Live forecasts, burn-time predictions tailored to your skin type,
threshold alerts, and widgets that follow the sun across your day.
WHAT HELIOS DOES
• Live UV index — updated hourly from Apple WeatherKit, with 30-second
interpolation between samples so the displayed value tracks reality, not the
last forecast tick.
• Time to burn — personalized to your Fitzpatrick skin type (I–VI), the same
six-type scale widely used in dermatology and public-health sun-safety
guidance. Helios maps your skin type to a documented minimum erythemal dose
and recomputes minutes-to-burn every 30 seconds against the current UV.
• Trend you can read — a 24-hour forecast rendered as a Catmull-Rom-spline
sparkline, segments colored by UV intensity. See the peak coming, and the
safe-time crossings flagged.
• Threshold alerts — pick the UV level that matters to you and Helios fires a
local notification when the forecast crosses it (Pro). Dangerous-UV safety
alerts are free for everyone.
• Widgets — Home Screen, Lock Screen, watch face, Smart Stack, macOS desktop,
Apple TV dashboard. Pro unlocks every surface.
• 12 Pro color palettes — Mono, Mono Teal, Vegas Neon, Pastel, Response, and
more. Standard and a colorblind-friendly High Contrast palette are included
free.
EVERYWHERE YOU WEAR, CARRY, OR SIT
One purchase. Five platforms. Each surface drawn for the device it lives on:
• iPhone & iPad — full dashboard, two widget sizes, threshold-crossing
notifications
• Mac — menu bar status item, dashboard window, four widget sizes
• Apple Watch — four complications and a Smart Stack tile
• Apple TV — a leanback living-room dashboard
POWERED BY APPLE WEATHERKIT
Every UV reading in Helios comes from Apple's own forecasting pipeline — the
same data that powers Apple's built-in Weather app. No scraped feeds, no
third-party API in front of someone else's API.
PRIVACY
Helios has no analytics SDKs, no advertising, no third-party crash reporters,
and no Kludge-operated server. Location goes to Apple WeatherKit;
subscriptions go to Apple StoreKit; settings stay on your device. Full privacy
policy: https://heliosuv.kludgeltd.com/privacy
PRICING
Helios is free to use with the full UV index forecast and dangerous-UV safety
alerts on every Apple device. Helios UV Pro unlocks every color palette, every
widget, watch complications, the macOS menu bar item, custom threshold
alerts, and the target-UV picker.
• Monthly: $0.99/month
• Yearly: $9.99/year (best value per month)
• Family Yearly: $14.99/year, shareable with up to 6 family members via Apple
Family Sharing
All Pro tiers include a 7-day free trial. Cancel anytime in Settings → Apple
ID → Subscriptions.
The minutes-to-burn estimate is a guide, not medical advice. Wear sunscreen,
reapply, and consult a dermatologist about your personal sun safety.
LEGAL
Privacy policy: https://heliosuv.kludgeltd.com/privacy
Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
5.0
out of 5
1 Ratings
Built for iPhone Duo! The app now fills both displays edge to edge, with the status bar and toolbar in the side strip on the outer display.
Version 1.1.2
The developer, Kludge Ltd, 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:
Purchases
Location
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More