Comparison

Aurora Notifier vs Dupp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Aurora Notifier

Receive alerts for potential aurora sightings with configurable thresholds for Kp-index and solar wind parameters. See user-submitted photos and real-time observation locations on a 3D globe. A premium version offers advanced technical data and hidden features.

Highlights
  • Aurora sighting notifications
  • Configurable alert thresholds
  • User-submitted aurora photos
  • Real-time observation map
  • Kp-index and solar wind data
  • Premium version with advanced features
Features
Read full description

Aurora notification app with observation reports. Finally available for iOS. This aurora notification app shows notifications when it may be possible to see the northern lights (aurora borealis / australis)! It provides configurable thresholds for local aurora probability, Kp-index (Hp30), solar wind parameters (Bz/Bt) and Kp-level forecast for the evening. It also allows you to be alerted when other app users nearby have seen the aurora light display. For the alert feature to work, other app users register aurora reports when they are successful hunting and get to see the aurora light display. This has proven to be quite successful. Many of the app users also upload pictures of northern lights when they see them, and in this app you can see these pictures. You can also see dots on a 3d-globe animation showing where people have just observed the light show. There are users in the US, Canada, Europe, Australia and New Zealand who regularly report their observations and upload pictures. Although the chances are greater if you live in Alaska, northern Canada, Norway, Sweden, Finland, the southern tip of New Zealand etc, there are also regular opportunities in places like Minnesota, Wisconsin, Washington, Montana, Michigan, Chicago, New York, Scotland, Denmark, Germany, the United Kingdom, France, the Baltics etc. The premium version which can be bought within the app itself offers some more technical information and graphs of Kp-index predictions, cloud cover and solar wind parameters - and some hidden features. The app has an associated X account (@aurora_notifier - https://x.com/aurora_notifier) and an Instagram account (@auroranotifierapp - https://www.instagram.com/auroranotifierapp). Consider following those.

About

Dupp

Features
Read full description

Hvor varmt er det i vannet? Dupp gir deg en enkel og oversiktlig måte å finne ferske badetemperaturer fra målesteder over hele Norge. Utforsk kartet, finn et badested i nærheten og se siste registrerte temperatur før du hopper uti. Med Dupp kan du: • Se badetemperaturer direkte på kartet • Finne målesteder i nærheten av deg • Velge ditt favorittsted • Se temperaturhistorikk og utvikling over tid • Følge langtidshistorikken for Dulpen i Holmestrand • Se temperaturen på favorittstedet direkte i en widget Hvis du ikke har valgt en favoritt, viser widgeten temperaturen på Dulpen – selve sjefen blant badestedene. Dupp er utviklet for Holmestrand badstuforening. Les mer og bestill badstutid på holmestrandfjordbadstu.no.

Screenshots

Aurora Notifier3 screens
Dupp4 screens

Verdict

The call

The clearest difference is in-app purchases: Dupp at none against Aurora Notifier's 2. Dupp also leads on device support (5 vs 2). Aurora Notifier's advantage is update cadence (every 5 days vs every 4 weeks). On price, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Aurora Notifier sells 2 one-off in-app purchases. Dupp asks for nothing beyond the download.

UpkeepUpdate frequency

Aurora Notifier ships an update every 5 days, Dupp every 4 weeks. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Aurora Notifier versus Dupp: the parameters behind the verdict, then further details
ParameterAurora NotifierDupp
PriceFreeFree
Rating4.5 (6 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 5 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac, Apple TV, Apple Watch — better
Requires iOS17.017.0
Further details — not scored
Size20 MB6 MB
Age rating4+4+
DeveloperNaturfakta ASTIM GROV

In-app purchases

2 purchases

Aurora Notifier

One-time2
  • Premium upgrade$2.99
  • Premium$3.99
None

Dupp

No in-app purchases

Questions

Is Aurora Notifier free?
Aurora Notifier is free to download, with in-app purchases available.
Is Dupp free?
Dupp is free to download, with no in-app purchases.
Do Aurora Notifier or Dupp have ads?
Neither Aurora Notifier nor Dupp shows ads.
Which is updated more often, Aurora Notifier or Dupp?
Aurora Notifier ships an update every 5 days, and Dupp every 4 weeks. Most recently, Aurora Notifier was updated on October 24, 2026 and Dupp on October 24, 2026.

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