# Alerte Contravention vs E6B Flight Computer

The clearest difference is in-app purchases: Alerte Contravention at none against E6B Flight Computer's 4. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. E6B Flight Computer sells 4 in-app purchases, starting at $1.99 per 7 days. Alerte Contravention asks for nothing beyond the download.

## The numbers

| Metric | Alerte Contravention | E6B Flight Computer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 32 MB | 49 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Adama Sy Traore](https://appshunter.io/developer/1602622903) | [Volkan Gunay](https://appshunter.io/developer/6790069760) |

## What reviewers say

### Alerte Contravention

[App page](https://appshunter.io/ios/app/alerte-contravention/id6805700701)

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

**In-app purchases:** none


### E6B Flight Computer

[App page](https://appshunter.io/ios/app/e6b-flight-computer-crabwise/id6814519654)

**Features:** macOS Compatibility, Vision Pro 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 Alerte Contravention free?

Alerte Contravention is free to download, with no in-app purchases.

### Is E6B Flight Computer free?

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

### Do Alerte Contravention or E6B Flight Computer have ads?

Neither Alerte Contravention nor E6B Flight Computer shows ads.

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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.*