# RS vs CX

The clearest difference is price: RS at Free against CX's $19.99. RS also leads on iOS requirement (13.0 vs 17.2). CX's advantage is rating (3.7 vs 1.5) and review sentiment (36% vs 4%). On ratings volume, ads, in-app purchases and device support there is nothing between them.

RS is free to download; CX costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CX holds the better App Store score, 3.7 against 1.5. Both are backed by a comparable volume of ratings — 19 and 11 respectively. Written reviews point the same way: 4% of RS's written reviews are positive against 36% of CX's.

RS ships an update every 34 months, CX every 8 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | RS | CX |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [1.5 (19 ratings)](https://appshunter.io/ios/app/rs-aero1i/id1257985737/reviews) | **[3.7 (11 ratings)](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895/reviews)** |
| Number of ratings | **19** | 11 |
| Positive reviews | 3.8% of reviews | **35.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 8 months** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#43** |
| Size | 14 MB | 3 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ICOM INCORPORATED](https://appshunter.io/developer/1193842631) | [ASA](https://appshunter.io/developer/334278379) |

## What reviewers say

### RS

[App page](https://appshunter.io/ios/app/rs-aero1i/id1257985737)

Create, edit, and manage waypoints and flight plans on a map. Instantly set destinations and import/export data from GPX and FPL files. Save and load your flight data for future use.

**Highlights:** Waypoint creation and editing, Flight plan creation and editing, Direct-to destination setting, GPX/FPL file import, Save and load flight data

**Features:** macOS Compatibility

**In-app purchases:** none


### CX

[App page](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895)

**Currently charting:** #43 Top Paid · Utilities (US App Store)

This aviation tool simplifies flight planning for pilots. It offers accurate calculations for time, speed, distance, fuel, and more, along with unit conversions and a built-in calculator. Designed for ease of use, it guides users through flight planning and execution with a natural menu flow.

**Highlights:** Flight planning calculations, Time, speed, distance functions, Fuel and altitude calculations, Unit conversions (12 categories), Weight and balance calculations, Holding pattern details, Built-in calculator, clock, timer

**In-app purchases:** none


## Frequently asked questions

### Is RS free?

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

### Is CX free?

CX costs $19.99, with no in-app purchases.

### Which has better reviews, RS or CX?

CX is rated higher. RS averages 1.5 out of 5 from 19 ratings, while CX averages 3.7 from 11 ratings.

### Do RS or CX have ads?

Neither RS nor CX shows ads.

### Which is updated more often, RS or CX?

RS ships an update every 34 months, and CX every 8 months. Most recently, RS was updated on November 2, 2026 and CX on November 7, 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.*