# E6B Aviation Calculator vs Crabwise

The clearest difference is update cadence: Crabwise at daily against E6B Aviation Calculator's every 3 weeks. Crabwise also leads on iOS requirement (15.0 vs 17). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. E6B Aviation Calculator sells 4 in-app purchases, starting at $2.99 per month and Crabwise sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

E6B Aviation Calculator ships an update every 3 weeks, Crabwise daily. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | E6B Aviation Calculator | Crabwise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (41 ratings)](https://appshunter.io/ios/app/e6b-aviation-calculator-flt9/id6475892430/reviews)** | — |
| Number of ratings | **41** | — |
| Positive reviews | 78.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 6 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Raj Jeshang](https://appshunter.io/developer/1725358290) | [Pouya Marvasti](https://appshunter.io/developer/6797565160) |

## What reviewers say

### E6B Aviation Calculator

[App page](https://appshunter.io/ios/app/e6b-aviation-calculator-flt9/id6475892430)

This app provides a comprehensive suite of aviation calculators, including E6B functions, ascent/descent planning, fuel calculations, and weight & balance. It supports various unit conversions and offers customizable default units for international users.

**Highlights:** E6B flight calculations, Ascent and descent planner, Fuel and weight/balance calculator, Holding pattern calculations, Performance data interpolation, Extensive unit conversions, Customizable default units

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $2.99 | per month |
| Full Access | $2.99 | per month |
| Full Access | $6.99 | per year |
| Lifetime Full Access | $8.99 | one-time |


### Crabwise

[App page](https://appshunter.io/ios/app/crabwise-e6b-flight-computer/id6813311167)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crabwise Pro | $9.99 | one-time |


## Frequently asked questions

### Is E6B Aviation Calculator free?

E6B Aviation Calculator is free to download, with in-app purchases available.

### Is Crabwise free?

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

### Do E6B Aviation Calculator or Crabwise have ads?

Neither E6B Aviation Calculator nor Crabwise shows ads.

### Which is updated more often, E6B Aviation Calculator or Crabwise?

E6B Aviation Calculator ships an update every 3 weeks, and Crabwise daily. Most recently, E6B Aviation Calculator was updated on November 4, 2026 and Crabwise on October 31, 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.*