# Pilot Calcs vs SolarShield Geomagnetic Alerts

The clearest difference is price: SolarShield Geomagnetic Alerts at Free against Pilot Calcs's $2.99. SolarShield Geomagnetic Alerts also leads on update cadence (fortnightly vs every 7 months). Pilot Calcs's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.5.0). On in-app purchases and device support there is nothing between them.

SolarShield Geomagnetic Alerts is free to download; Pilot Calcs costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pilot Calcs ships an update every 7 months, SolarShield Geomagnetic Alerts fortnightly. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Pilot Calcs | SolarShield Geomagnetic Alerts |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.0 (12 ratings)](https://appshunter.io/ios/app/pilot-calcs/id424010847/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 10 MB | 32 MB |
| Requires iOS | **9.0** | 15.5.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Simon McAuliffe](https://appshunter.io/developer/1740443236) |

## What reviewers say

### Pilot Calcs

[App page](https://appshunter.io/ios/app/pilot-calcs/id424010847)

This app provides over 130 aviation-specific calculations and unit conversions for pilots. It aids in trip planning, in-flight adjustments, and maintenance with detailed descriptions, equations, and graphics. Users can save calculations, add favorites, and share results via email.

**Highlights:** Over 130 aviation calculations, Unit conversions, Trip planning tools, In-flight calculations, Maintenance references, Save and favorite calculations, Email calculation results

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

**In-app purchases:** none


### SolarShield Geomagnetic Alerts

[App page](https://appshunter.io/ios/app/solarshield-geomagnetic-alerts/id6747309109)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pilot Calcs free?

Pilot Calcs costs $2.99, with no in-app purchases.

### Is SolarShield Geomagnetic Alerts free?

SolarShield Geomagnetic Alerts is free to download, with no in-app purchases.

### Do Pilot Calcs or SolarShield Geomagnetic Alerts have ads?

SolarShield Geomagnetic Alerts shows ads; Pilot Calcs does not.

### Which is updated more often, Pilot Calcs or SolarShield Geomagnetic Alerts?

Pilot Calcs ships an update every 7 months, and SolarShield Geomagnetic Alerts fortnightly. Most recently, Pilot Calcs was updated on September 9, 2026 and SolarShield Geomagnetic Alerts on September 18, 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.*