# CX vs RLM

The clearest difference is price: RLM at Free against CX's $19.99. RLM also leads on rating (5.0 vs 3.7) and update cadence (every 3 weeks vs every 8 months). CX's advantage is in-app purchases (none vs 1) and chart position (#58 vs unranked). On ads and device support there is nothing between them.

RLM is free to download; CX costs $19.99 up front. RLM sells 1 one-off in-app purchase. CX asks for nothing beyond the download.

RLM holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: CX has 11 ratings behind it against 2, so its average is the more settled of the two.

CX ships an update every 8 months, RLM every 3 weeks. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | CX | RLM |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [3.7 (11 ratings)](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rlm-flight/id6448285133/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 35.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#58** | — |
| Size | 3 MB | 6 MB |
| Requires iOS | 17.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ASA](https://appshunter.io/developer/334278379) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### CX

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

**Currently charting:** #58 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


### RLM

[App page](https://appshunter.io/ios/app/rlm-flight/id6448285133)

This aviation computer app offers a comprehensive suite of tools for pilots. It calculates various flight parameters, including altitude, airspeed, ground speed, wind components, and weight & balance. The app also features unit and currency conversions, making it a versatile utility for aviation professionals.

**Highlights:** Altitude & Cloud Base Calculations, Airspeed & Ground Speed Calculations, Wind Component & Correction Tools, Weight & Balance Calculations, Unit & Currency Conversion, Holding Pattern & Flight Plan Tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Full Access | $9.99 | one-time |


## Frequently asked questions

### Is CX free?

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

### Is RLM free?

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

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

RLM is rated higher. CX averages 3.7 out of 5 from 11 ratings, while RLM averages 5.0 from 2 ratings.

### Do CX or RLM have ads?

Neither CX nor RLM shows ads.

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

CX ships an update every 8 months, and RLM every 3 weeks. Most recently, CX was updated on September 22, 2026 and RLM on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*