# Leon vs Slipstream Aviation

Leon and Slipstream Aviation are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Leon ships an update fortnightly, Slipstream Aviation every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Leon | Slipstream Aviation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (8 ratings)](https://appshunter.io/ios/app/leon/id443136426/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 36 MB | 25 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Leon Software](https://appshunter.io/developer/443136429) | [Captain Decision OU](https://appshunter.io/developer/1787193987) |

## What reviewers say

### Leon

[App page](https://appshunter.io/ios/app/leon/id443136426)

This application provides aviation crew members with mobile access to crew information managed by air operators. It supports aircraft operations with features for scheduling, rostering, dispatch, and flight watch, all accessible through a central online database.

**Highlights:** Mobile crew information access, Aircraft operations support, Scheduling and rostering, Airplane dispatch, Online flight watch, Centralized database access

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

**In-app purchases:** none


### Slipstream Aviation

[App page](https://appshunter.io/ios/app/slipstream-aviation/id6758707599)

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

**In-app purchases:** none


## Frequently asked questions

### Is Leon free?

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

### Is Slipstream Aviation free?

Slipstream Aviation is free to download, with no in-app purchases.

### Do Leon or Slipstream Aviation have ads?

Neither Leon nor Slipstream Aviation shows ads.

### Which is updated more often, Leon or Slipstream Aviation?

Leon ships an update fortnightly, and Slipstream Aviation every 3 weeks. Most recently, Leon was updated on October 23, 2026 and Slipstream Aviation on October 24, 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.*