Best Free Aurora App 2026: Free Aurora Apps Compared
Free aurora apps compared: which ones show only Kp, which add cloud cover and push alerts, and which tell you plainly whether tonight is worth going out.
Every popular aurora app is free to download. What separates them is the answer they give you: a raw Kp number you have to interpret, or a plain verdict on whether aurora will be visible from where you stand tonight. This guide compares the free aurora apps on that question.
Free Aurora Apps Compared
| Feature | AuroraMe | My Aurora Forecast | Hello Aurora | Aurora Alerts |
|---|---|---|---|---|
| Aurora forecast model | 5 factors in one verdict | Kp score, clouds on a separate map | Kp + clouds | Kp only |
| Alert types | 15 | 2 | 2 | 3 |
| Predictive alerts (30-90 min ahead) | ✓ | ✗ | ✗ | ✗ |
| Map overlays | 6 | 2 | 2 | 1 |
| Locations | Any point on Earth | ~500 cities | Major cities | ~200 cities |
| Moon phase in the forecast | ✓ | ✗ | ✗ | ✗ |
| Forecast range | 72 hours + 27-day outlook | Current conditions | 24 hours | 72 hours |
| Aurora history for trip planning | 11 years | ✗ | ✗ | ✗ |
| Languages | 37 | 1 | 3 | 5 |
| Ads | No | Yes | No | No |
All four apps are free to install on iOS and Android. AuroraMe is the only one that folds clouds, moonlight and darkness into the forecast itself instead of leaving that work to you.
What AuroraMe Does
5-Factor Visibility Model
Most aurora apps show one number, the Kp index, and leave the rest to you. AuroraMe combines five factors into one clear answer:
- Kp index — geomagnetic activity sourced from NOAA and GFZ with automatic failover
- Cloud cover — recent weather from a privacy-preserving 0.25° local grid near your selected GPS point; clouds block aurora completely and account for the majority of missed sightings
- Moon phase — a full moon washes out faint aurora; the app factors lunar brightness into its visibility score automatically
- Astronomical darkness — aurora is invisible during civil or nautical twilight; the app checks your local darkness window so you aren't sent outside at dusk
- Magnetic latitude — your distance from the magnetic pole determines the Kp threshold you need; someone in northern Norway needs a lower Kp than someone in the English Midlands
The result is a plain-language status: Clearly Visible, Visible, Faintly Visible, or Unlikely.
Alerts That Wake You Only When It Matters
AuroraMe has 15 alert types on iOS and Android. The ones most people keep on:
- Aurora alert — conditions at your location cross your chosen visibility level right now
- Predictive alert (30-90 min ahead) — a solar wind change is on its way, so you have time to get outside or drive to a dark spot
- Storm warning — a strong geomagnetic storm is forecast or under way
- Bz early warning — southward Bz signals that aurora may start soon
- CME tracking — a coronal mass ejection is heading for Earth, with an arrival estimate
Quiet hours keep alerts off while you sleep, and each saved location can have its own alert settings.
6 Map Overlays
- Aurora activity (NOAA OVATION model)
- Cloud cover
- Sunlight and twilight
- Light pollution
- Best spots
- Saved locations
Tap any point on the map to get a location-specific forecast. There is no city list, so you can check a wilderness spot or a field outside a village.
Trip Planning
The 27-day outlook follows the sun's rotation to flag which upcoming nights carry higher aurora odds, and 11 years of aurora history show which weeks have been most active at your destination. Together they help you pick travel dates weeks in advance.
Sun Intelligence
Real-time images from nine NOAA solar feeds, including GOES SUVI extreme UV imagery and the LASCO coronagraph views used to track CMEs before they arrive, explained for non-scientists.
37 Languages
AuroraMe is translated into 37 languages, including Finnish, Norwegian, Icelandic, Russian, Japanese, and Korean. My Aurora Forecast is English-only; Aurora Alerts supports 5 languages.
Why a Kp Number Is Not Enough
A first-time aurora chaser downloads an app before a trip to Tromsø. On a Kp-only app, they get an alert that Kp is 4, step outside, and see nothing because it's overcast. They conclude the app is wrong. AuroraMe would not have sent that alert: the cloud factor would have held it back. Every app uses the same NOAA data; the difference is whether your local sky is part of the answer.
Moonlight and twilight cause the next most common wasted trips. A bright moon hides faint aurora, and in the far north the sky may not get dark enough until late at night. AuroraMe checks both for your exact spot.
Bottom Line
Among free aurora apps, AuroraMe gives the most complete answer: one verdict for your location, alerts only when aurora is likely visible, and planning tools for trips. Kp-only apps are fine for a quick glance at global activity.
Who AuroraMe Suits
- Home-based aurora watchers — save your home or a regular dark-sky spot and let the alerts tell you when to look.
- First-time northern lights travelers — the plain-language status means no prior knowledge is needed, and the 27-day outlook shows whether your dates fall in a promising window.
- Travelers across several regions — save every destination and get alerts for whichever one clears first.
- Non-English speakers — 37 languages cover most of the world's aurora-chasing population.
- Science-curious users — Sun Intelligence shows the NOAA solar imagery behind each forecast.
Looking for the Full Comparison?
The companion guide compares aurora apps and data sources feature by feature, including NOAA: Best Aurora App 2026: Aurora Forecast Apps Compared.
Frequently Asked Questions
Is AuroraMe free to download?
Yes. AuroraMe is free on the App Store and Google Play, has no ads and needs no account. Open it and it shows tonight's verdict for your location straight away.
What is the best free aurora app for beginners?
AuroraMe is the best free aurora app for beginners because it turns raw space-weather data into plain language ('Clearly Visible', 'Visible', 'Faintly Visible', 'Unlikely') instead of a raw Kp number. It also integrates cloud cover and moon phase automatically so you never need to cross-reference multiple sources.
Do free aurora apps send push notifications?
Most do, but they differ in what triggers them. Kp-only apps alert you when the global Kp crosses a number, even if your sky is overcast. AuroraMe alerts you when aurora is likely visible where you are, including predictive warnings 30-90 minutes ahead.
Is the forecast in a free aurora app accurate?
Every app starts from the same NOAA and GFZ space-weather data. The difference is what happens next: AuroraMe also checks cloud cover, moonlight, darkness and your magnetic latitude, so its verdict matches what you can actually see from your spot.
Sources
- NOAA SWPC — Planetary K-index — primary data source for aurora forecasting
- NOAA SWPC — OVATION Aurora Forecast — aurora probability model