# Aurora Notifier vs Dupp

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.

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

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

## The numbers

| Metric | Aurora Notifier | Dupp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/aurora-notifier/id6532618262/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Naturfakta AS](https://appshunter.io/developer/1756730718) | [TIM GROV](https://appshunter.io/developer/6804154244) |

## What reviewers say

### Aurora Notifier

[App page](https://appshunter.io/ios/app/aurora-notifier/id6532618262)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium upgrade | $2.99 | one-time |
| Premium | $3.99 | one-time |


### Dupp

[App page](https://appshunter.io/ios/app/dupp-badetemperaturer/id6807764493)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*