# Solar Activity vs SpinVane

The clearest difference is price: Solar Activity at Free against SpinVane's $1.99. Solar Activity also leads on iOS requirement (15.0 vs 18.2). SpinVane's advantage is ads (none vs shown) and update cadence (daily vs every 3 months). On in-app purchases and device support there is nothing between them.

Solar Activity is free to download; SpinVane costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Solar Activity ships an update every 3 months, SpinVane daily. Both last shipped on September 10, 2026.

## The numbers

| Metric | Solar Activity | SpinVane |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/solar-activity/id1460144397/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Ad-supported | — |
| Size | 33 MB | 10 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Koyushev](https://appshunter.io/developer/1257728721) | [Yu Ikeda](https://appshunter.io/developer/394579323) |

## What reviewers say

### Solar Activity

[App page](https://appshunter.io/ios/app/solar-activity/id1460144397)

Track solar activity with a forecast for magnetic storms up to 27 days in advance. View the latest images and videos of the sun, and monitor key metrics like the Kp index and sunspots.

**Highlights:** Magnetic storm forecast, Kp index forecast (3-27 days), Aurora borealis predictions, Sunspot tracking, Solar wind monitoring, Latest SOHO/SDO images & videos

**Features:** macOS Compatibility

**In-app purchases:** none


### SpinVane

[App page](https://appshunter.io/ios/app/spinvane/id6745381092)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Activity free?

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

### Is SpinVane free?

SpinVane costs $1.99, with no in-app purchases.

### Do Solar Activity or SpinVane have ads?

Solar Activity shows ads; SpinVane does not.

### Which is updated more often, Solar Activity or SpinVane?

Solar Activity ships an update every 3 months, and SpinVane daily. Most recently, Solar Activity was updated on September 10, 2026 and SpinVane on September 10, 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.*