# iFMS vs E6B Flight & Wind Calculator

The clearest difference is price: E6B Flight & Wind Calculator at Free against iFMS's $15.99. iFMS's advantage is in-app purchases (none vs 4) and iOS requirement (8.1 vs 15.0). On update cadence, ads and device support there is nothing between them.

E6B Flight & Wind Calculator is free to download; iFMS costs $15.99 up front. E6B Flight & Wind Calculator sells 4 in-app purchases, starting at $1.99 per 7 days. iFMS asks for nothing beyond the download.

iFMS ships an update every 4 weeks, E6B Flight & Wind Calculator fortnightly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | iFMS | E6B Flight & Wind Calculator |
| --- | --- | --- |
| Price | $15.99 | **Free** |
| Rating | **[3.1 (14 ratings)](https://appshunter.io/ios/app/ifms/id651887277/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 45.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 50 MB | 47 MB |
| Requires iOS | **8.1** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Michael Feyter](https://appshunter.io/developer/651887280) | [Volkan Gunay](https://appshunter.io/developer/6790069760) |

## What reviewers say

### iFMS

[App page](https://appshunter.io/ios/app/ifms/id651887277)

Enhance your flight simulator experience with a realistic Boeing-style Flight Management System and cockpit displays on your mobile device. Build a home cockpit and connect to popular simulators over your local network for immersive practice.

**Highlights:** Realistic Flight Planning/Tracking/Navigation, Boeing style Flight Management System, Boeing style Primary Flight Display, Various EICAS Displays, LNAV & VNAV autopilot control, Configurable aircraft, Updatable navdata

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

**In-app purchases:** none


### E6B Flight & Wind Calculator

[App page](https://appshunter.io/ios/app/e6b-flight-and-wind-calculator/id6814519654)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crabwise Weekly | $1.99 | per 7 days |
| Crabwise Monthly | $4.99 | per month |
| Crabwise Yearly | $19.99 | per year |
| Crabwise Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is iFMS free?

iFMS costs $15.99, with no in-app purchases.

### Is E6B Flight & Wind Calculator free?

E6B Flight & Wind Calculator is free to download, with in-app purchases available.

### Do iFMS or E6B Flight & Wind Calculator have ads?

Neither iFMS nor E6B Flight & Wind Calculator shows ads.

### Which is updated more often, iFMS or E6B Flight & Wind Calculator?

iFMS ships an update every 4 weeks, and E6B Flight & Wind Calculator fortnightly. Most recently, iFMS was updated on October 29, 2026 and E6B Flight & Wind Calculator on October 28, 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.*