Solar Activity vs smart
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
smart
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Smart ETO is an advanced agricultural monitoring tool designed to optimize water use in irrigation systems. Through connected sensors and real-time climate data, the app enables growers, technicians, and agronomists to make informed decisions to improve irrigation efficiency and increase crop productivity.
Screenshots
Verdict
The clearest difference is ads: smart at none against Solar Activity's shown. On price, update cadence, 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.
Solar Activity ships an update every 3 months, smart every 2 months. The most recent releases landed on October 25, 2026 and October 6, 2026 respectively.
| Parameter | Solar Activity | smart |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 41 MB |
| Age rating | 4+ | +4 |
| Developer | Pavel Koyushev | GLOBALMET SAPI DE CV |
In-app purchases
Solar Activity
No in-app purchases
smart
No in-app purchases
