Heliocast: Aurora Forecast

Northern Lights, Space Weather

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

Will you see the aurora tonight? Heliocast answers the moment you open it, in a sentence, for exactly where you are standing. Most aurora apps hand you a Kp number and leave the hard part to you. But a Kp 6 is worth nothing under cloud, worth nothing under a full moon, and worth nothing at 9pm in June. Heliocast checks all four at once - geomagnetic activity, darkness, moonlight and your local cloud - and gives you one verdict with the reason attached. When the answer is no, it names which of the four is stopping you. TONIGHT, ANSWERED - A plain-language verdict and a 0-100 visibility score for your coordinates - Tonight's astronomical dark window, and how long it lasts - Moon phase, cloud cover by layer, live Kp and Bz - Where the auroral oval is sitting right now WHICH NIGHT TO GO - Every night ahead ranked on darkness, moon, cloud and the NOAA forecast - An hour-by-hour grid, 6pm to 6am, for the next three nights - Save the place you are travelling to and plan against its sky, not yours ALERTS THAT KNOW YOUR SKY - Our server watches NOAA's 1-minute feed all night and wakes your phone the moment your threshold is crossed, with the app closed - Cloud-aware and dark-aware by default, so a storm you could never have seen does not ring at 3am - Thresholds on Kp, and with Pro on Bz, solar wind speed and visibility A 3D AURORA MAP - Spin a live globe carrying the OVATION auroral oval and the day/night line - Six Arctic observatories and their all-sky cameras, one tap away: Yellowknife, Churchill, Fairbanks, Sodankyla, Tromso and Kiruna THE SUN, IN FULL - NASA SDO in eight wavelengths, plus white-light continuum and magnetogram - Active regions plotted at their real heliographic positions - SOHO/LASCO C2 and C3 coronagraphs, and GOES CCOR-1 - L1 solar wind speed, density and the full interplanetary magnetic field - GOES X-ray and proton flux with flare classes, for anyone watching HF propagation and radio blackouts WHAT IS HEADING THIS WAY - Earth-directed CMEs with predicted arrival times and expected Kp - Flare history, live NOAA watches and warnings, and the R, S and G scales Plus a sightings journal that files the conditions alongside your photo, so you learn what actually works, and a Learn section that explains every number in the app. WIDGETS Tonight's verdict on your home screen and your lock screen. EIGHT AUTHORITATIVE FEEDS NOAA SWPC, NASA SDO, NASA DONKI, SOHO/LASCO, GOES, DSCOVR, Kyoto WDC and USGS, and MET Norway for cloud. Everything is fetched and cached on our own server, so the app stays fast and the agencies never see anything about you. FREE, AND HONEST ABOUT IT No account. No ads. No sign-up wall. The free tier is a real app: tonight's verdict, the full 3D map, live Kp, the Sun and solar wind, the observatories, the journal, and one overnight alert. HELIOCAST PRO $4.99 a year. Not a month. That is about 42 cents a month, and less than most aurora apps charge for four weeks. - The full 14-night ranking, not just three - Up to 10 saved places, home and the trip - Unlimited alerts on Bz, wind speed and visibility, plus quiet hours - A weather-radar layer on the globe - Your full sightings archive, kept with its conditions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula

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We improved app performance and aurora notifications.

Version 1.2.0

The developer, Ingenio Productions LLC, 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 Not Linked to You

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

    • Location
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

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
Ingenio Productions LLC
Size
47.8 MB
Category
Weather
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • iPad
    Requires iPadOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026
  • Developer Website
  • Privacy Policy

    • More by Ingenio Productions LLC

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