# Lightspeed App vs RLM

The clearest difference is rating: RLM at 5.0 against Lightspeed App's 3.3. RLM also leads on update cadence (every 3 weeks vs every 6 months). Lightspeed App's advantage is in-app purchases (none vs 1) and ratings volume (49 vs 2). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. RLM sells 1 one-off in-app purchase. Lightspeed App asks for nothing beyond the download.

RLM holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Lightspeed App has 49 ratings behind it against 2, so its average is the more settled of the two.

Lightspeed App ships an update every 6 months, RLM every 3 weeks. The most recent releases landed on September 7, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Lightspeed App | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (49 ratings)](https://appshunter.io/ios/app/lightspeed-app/id1469234593/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rlm-flight/id6448285133/reviews)** |
| Number of ratings | **49** | 2 |
| Positive reviews | 11.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 71 MB | 6 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lightspeed Aviation](https://appshunter.io/developer/541925734) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### Lightspeed App

[App page](https://appshunter.io/ios/app/lightspeed-app/id1469234593)

Enhance your flight experience with real-time CO sensor monitoring and personalized audio. Record and archive radio conversations for review and training.

**Highlights:** Real-time CO sensor tracking, Smart CO alerts, Personalized audio equalization (HearingEQity™), Record radio conversations, Archive flight recordings, Draw flight diagrams

**Features:** Vision Pro support

**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 Lightspeed App free?

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

### Is RLM free?

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

### Which has better reviews, Lightspeed App or RLM?

RLM is rated higher. Lightspeed App averages 3.3 out of 5 from 49 ratings, while RLM averages 5.0 from 2 ratings.

### Do Lightspeed App or RLM have ads?

Neither Lightspeed App nor RLM shows ads.

### Which is updated more often, Lightspeed App or RLM?

Lightspeed App ships an update every 6 months, and RLM every 3 weeks. Most recently, Lightspeed App was updated on September 7, 2026 and RLM on September 10, 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.*