# Solar Flare Alert vs StormWatch

The clearest difference is in-app purchases: StormWatch at none against Solar Flare Alert's 2. StormWatch also leads on update cadence (every 3 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Solar Flare Alert sells 2 in-app purchases, starting at $3.99 per month. StormWatch asks for nothing beyond the download.

Solar Flare Alert ships an update every 3 weeks, StormWatch every 3 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Solar Flare Alert | StormWatch |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Subscription | — |
| Size | 13 MB | 1 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Daniel Miara](https://appshunter.io/developer/1871192988) | [John Hatton-Edge](https://appshunter.io/developer/1882118119) |

## What reviewers say

### Solar Flare Alert

[App page](https://appshunter.io/ios/app/solar-flare-alert-forecasts/id6758160984)

Stay informed about space weather with real-time solar flare alerts, forecasts, and geomagnetic storm data. Monitor solar wind, IMF, and view the latest coronagraph imagery. Includes widgets and Apple Watch support for quick access to critical information.

**Highlights:** Solar flare and geomagnetic storm alerts, Live space weather data (Kp index, solar wind), Coronagraph imagery for CME tracking, Home Screen and Lock Screen widgets, Apple Watch app with Live Activity, Data from NOAA and NASA sources

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solar Flare Alert: Forecasts | $3.99 | per month |
| Auto-renewable annual subscription | $29.99 | per year |


### StormWatch

[App page](https://appshunter.io/ios/app/stormwatch/id6760827073)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Flare Alert free?

Solar Flare Alert is free to download, with in-app purchases available.

### Is StormWatch free?

StormWatch is free to download, with no in-app purchases.

### Do Solar Flare Alert or StormWatch have ads?

Neither Solar Flare Alert nor StormWatch shows ads.

### Which is updated more often, Solar Flare Alert or StormWatch?

Solar Flare Alert ships an update every 3 weeks, and StormWatch every 3 days. Most recently, Solar Flare Alert was updated on November 9, 2026 and StormWatch on November 5, 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.*