Solar Activity vs SpinVane
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Activity
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.
- Magnetic storm forecast
- Kp index forecast (3-27 days)
- Aurora borealis predictions
- Sunspot tracking
- Solar wind monitoring
- Latest SOHO/SDO images & videos
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Monitor solar activity. Get a solar storm forecast for the next 3-27 days and view the latest images and videos from SOHO/SDO. Also includes: - magnetic storm forecast - Kp index forecast for 3/27 days - aurora borealis - sunspots - solar wind
SpinVane
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SpinVane is a lightweight wind direction app designed for Apple Watch. With a single tap, it shows you the current wind direction in real time—no extra steps, no distractions. Perfect for walks, golf, outdoor adventures, or those curious moments when you just want to know where the wind is blowing. Its clean, intuitive interface keeps things simple, so you can check the wind without missing a beat. Bring a smart little weather vane to your wrist with SpinVane.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Solar Activity | SpinVane |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 33 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Pavel Koyushev | Yu Ikeda |
In-app purchases
Solar Activity
No in-app purchases
SpinVane
No in-app purchases
