# REI Empire vs Skyline Sim

The clearest difference is price: Skyline Sim at Free against REI Empire's $4.99. Skyline Sim also leads on update cadence (fortnightly vs every 3 months). REI Empire's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases there is nothing between them.

Skyline Sim is free to download; REI Empire costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

REI Empire ships an update every 3 months, Skyline Sim fortnightly. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | REI Empire | Skyline Sim |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/skyline-sim/id6809383564/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 36 MB | 169 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dwayne Woodson](https://appshunter.io/developer/1832615088) | [Prakhar Singh](https://appshunter.io/developer/6809383566) |

## What reviewers say

### REI Empire

[App page](https://appshunter.io/ios/app/rei-empire/id6752371144)

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

**In-app purchases:** none


### Skyline Sim

[App page](https://appshunter.io/ios/app/skyline-sim/id6809383564)

Manage and grow your own airline from a single leased plane to a global mega-empire. Make strategic decisions about routes, fleet, staff, and finances in a detailed simulation. Compete against real rivals and navigate industry events to achieve profitability and dominance.

**Highlights:** Route planning and network building, Fleet acquisition and customization, Staff management and development, Financial analysis and reporting, Competitive industry simulation, Regional economic differences

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

**In-app purchases:** none


## Frequently asked questions

### Is REI Empire free?

REI Empire costs $4.99, with no in-app purchases.

### Is Skyline Sim free?

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

### Do REI Empire or Skyline Sim have ads?

Skyline Sim shows ads; REI Empire does not.

### Which is updated more often, REI Empire or Skyline Sim?

REI Empire ships an update every 3 months, and Skyline Sim fortnightly. Most recently, REI Empire was updated on October 28, 2026 and Skyline Sim on October 26, 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.*