Solario vs Solar Activity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solario
This app displays the current and forecasted geomagnetic field conditions using the Kp-index. It helps users understand disturbances and their potential impact on power grids, spacecraft, radio signals, and aurora visibility.
- Kp-index display
- Geomagnetic field forecast
- Real-time geomagnetic state
- Aurora visibility information
- Impact on electrical grids
- Spacecraft operations data
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Solario shows the forecast and the actual state of Earth’s geomagnetic field using the Kp-index. The index quantifies disturbances of the geomagnetic field with a value in the range 0–9 with 0 being calm and 5 or more indicating a geomagnetic storm. The principal users affected by geomagnetic storms are the electrical power grid, spacecraft operations, users of radio signals that reflect off of or pass through the ionosphere, and observers of the aurora.
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
Screenshots
Verdict
The clearest difference is review sentiment: Solario at 78% against Solar Activity's 25%. Solario also leads on rating (3.8 vs 1.0) and ads (none vs shown). Solar Activity's advantage is update cadence (every 3 months vs every 12 months). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Solario holds the better App Store score, 3.8 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 78% of Solario's written reviews are positive against 25% of Solar Activity's.
Solario ships an update every 12 months, Solar Activity every 3 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | Solario | Solar Activity |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 77.8% of reviews — better | 25.0% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 12 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Hermann Wagenleitner | Pavel Koyushev |
Customer experience
Solario
Solar Activity
In-app purchases
Solario
No in-app purchases
Solar Activity
No in-app purchases
