# Solar Sphere vs Sol Clock

The clearest difference is in-app purchases: Solar Sphere at none against Sol Clock's 2. Solar Sphere also leads on device support (4 vs 2) and iOS requirement (9.0 vs 26.0). Sol Clock's advantage is update cadence (every 11 days vs every 9 months). On price and ads there is nothing between them.

Both are free to download. Sol Clock sells 2 in-app purchases, starting at $0.99 per month. Solar Sphere asks for nothing beyond the download.

Solar Sphere ships an update every 9 months, Sol Clock every 11 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Solar Sphere | Sol Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (7 ratings)](https://appshunter.io/ios/app/solar-sphere/id990396823/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 3 MB | 8 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Pulsely Consulting](https://appshunter.io/developer/475349326) | [Mark Zigadlo](https://appshunter.io/developer/1879779038) |

## What reviewers say

### Solar Sphere

[App page](https://appshunter.io/ios/app/solar-sphere/id990396823)

Monitor real-time solar activity with Kp-index data and high-resolution solar images. Understand geomagnetic disturbances and their impact on Earth's magnetic field. Ideal for drone pilots needing to check conditions before flying.

**Highlights:** Real-time Kp-index monitoring, High-resolution solar images, Kp-index explanation, Geomagnetic storm indication, Drone flying safety guidance

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

**In-app purchases:** none


### Sol Clock

[App page](https://appshunter.io/ios/app/sol-clock-sun-and-moon-tracker/id6770347619)

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Annual | $7.99 | per year |


## Frequently asked questions

### Is Solar Sphere free?

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

### Is Sol Clock free?

Sol Clock is free to download, with in-app purchases available.

### Do Solar Sphere or Sol Clock have ads?

Neither Solar Sphere nor Sol Clock shows ads.

### Which is updated more often, Solar Sphere or Sol Clock?

Solar Sphere ships an update every 9 months, and Sol Clock every 11 days. Most recently, Solar Sphere was updated on November 12, 2026 and Sol Clock on November 9, 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.*