# E6B Pilot Flight Computer vs Site Calc Pro

The clearest difference is in-app purchases: Site Calc Pro at none against E6B Pilot Flight Computer's 1. Site Calc Pro also leads on update cadence (daily vs every 9 days) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. E6B Pilot Flight Computer sells 1 one-off in-app purchase. Site Calc Pro asks for nothing beyond the download.

E6B Pilot Flight Computer ships an update every 9 days, Site Calc Pro daily. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | E6B Pilot Flight Computer | Site Calc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | **Daily** |
| Size | 2 MB | 85 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [光 杨](https://appshunter.io/developer/1891134953) | [Troy Knight](https://appshunter.io/developer/1419339802) |

## What reviewers say

### E6B Pilot Flight Computer

[App page](https://appshunter.io/ios/app/e6b-pilot-flight-computer/id6765578661)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Nav-Log Cards | $7.99 | one-time |


### Site Calc Pro

[App page](https://appshunter.io/ios/app/site-calc-pro/id6767140419)

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

**In-app purchases:** none


## Frequently asked questions

### Is E6B Pilot Flight Computer free?

E6B Pilot Flight Computer is free to download, with in-app purchases available.

### Is Site Calc Pro free?

Site Calc Pro is free to download, with no in-app purchases.

### Do E6B Pilot Flight Computer or Site Calc Pro have ads?

Neither E6B Pilot Flight Computer nor Site Calc Pro shows ads.

### Which is updated more often, E6B Pilot Flight Computer or Site Calc Pro?

E6B Pilot Flight Computer ships an update every 9 days, and Site Calc Pro daily. Most recently, E6B Pilot Flight Computer was updated on October 3, 2026 and Site Calc Pro on October 7, 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.*